Rollup of 4 pull requests

Successful merges:

 - rust-lang#127763 (Make more Windows functions `#![deny(unsafe_op_in_unsafe_fn)]`)
 - rust-lang#127813 (Prevent double reference in generic futex)
 - rust-lang#127847 (Reviewer on vacation)
 - rust-lang#127850 (bootstrap: open `llvm-config` as r+w)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup of 4 pull requests

Successful merges:

 - rust-lang#127763 (Make more Windows functions `#![deny(unsafe_op_in_unsafe_fn)]`)
 - rust-lang#127813 (Prevent double reference in generic futex)
 - rust-lang#127847 (Reviewer on vacation)
 - rust-lang#127850 (bootstrap: open `llvm-config` as r+w)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#127850 - jieyouxu:bootstrap-llvm-config, r=onur-ozkan

bootstrap: open `llvm-config` as r+w

This previously failed on Windows and prevented building on Windows for compiler stuff because the `llvm-config` file was open as read-only.

Tested locally on a Windows machine.

Fixes rust-lang#127849.

Only try to modify file times of a writable file

- First commit fixes a failure that I was running into locally trying to build a stage 1 `./x build library --stage 1` on windows due to trying to modify file times of a read-only file.
- Second commit introduces a `set_file_times` helper which opens a given path as a file in r+w mode and then sets file times. This should hopefully make setting file times less error prone, since trying to set file times on read-only file also happened in rust-lang#127850. (And apparently it only fails locally on Windows or something weird like that.)

Only try to modify file times of a writable file

- First commit fixes a failure that I was running into locally trying to build a stage 1 `./x build library --stage 1` on windows due to trying to modify file times of a read-only file.
- Second commit introduces a `set_file_times` helper which opens a given path as a file in r+w mode and then sets file times. This should hopefully make setting file times less error prone, since trying to set file times on read-only file also happened in rust-lang#127850. (And apparently it only fails locally on Windows or something weird like that.)

Only try to modify file times of a writable file

- First commit fixes a failure that I was running into locally trying to build a stage 1 `./x build library --stage 1` on windows due to trying to modify file times of a read-only file.
- Second commit introduces a `set_file_times` helper which opens a given path as a file in r+w mode and then sets file times. This should hopefully make setting file times less error prone, since trying to set file times on read-only file also happened in rust-lang#127850. (And apparently it only fails locally on Windows or something weird like that.)

try-job: dist-loongarch64-musl

Only try to modify file times of a writable file

- First commit fixes a failure that I was running into locally trying to build a stage 1 `./x build library --stage 1` on windows due to trying to modify file times of a read-only file.
- Second commit introduces a `set_file_times` helper which opens a given path as a file in r+w mode and then sets file times. This should hopefully make setting file times less error prone, since trying to set file times on read-only file also happened in rust-lang#127850. (And apparently it only fails locally on Windows or something weird like that.)

try-job: dist-loongarch64-musl
try-job: x86_64-msvc

Only try to modify file times of a writable file on Windows

Introduces a `set_file_times` helper which opens a given path as a file in r+w mode on Windows and then sets file times. Previously the file was open as read-only for Windows which caused permission errors locally.

This should hopefully make setting file times less error prone, since trying to set file times on read-only file on Windows also happened in rust-lang#127850.

try-job: dist-loongarch64-musl
try-job: x86_64-msvc

Only try to modify file times of a writable file on Windows

Introduces a `set_file_times` helper which opens a given path as a file in r+w mode on Windows and then sets file times. Previously the file was open as read-only for Windows which caused permission errors locally.

This should hopefully make setting file times less error prone, since trying to set file times on read-only file on Windows also happened in rust-lang#127850.

try-job: dist-loongarch64-musl
try-job: x86_64-msvc

Only try to modify file times of a writable file on Windows

Introduces a `set_file_times` helper which opens a given path as a file in r+w mode on Windows and then sets file times. Previously the file was open as read-only for Windows which caused permission errors locally.

This should hopefully make setting file times less error prone, since trying to set file times on read-only file on Windows also happened in rust-lang#127850.

try-job: dist-loongarch64-musl
try-job: x86_64-msvc

Only try to modify file times of a writable file on Windows

Introduces a `set_file_times` helper which opens a given path as a file in r+w mode on Windows and then sets file times. Previously the file was open as read-only for Windows which caused permission errors locally.

This should hopefully make setting file times less error prone, since trying to set file times on read-only file on Windows also happened in rust-lang#127850.

try-job: dist-loongarch64-musl
try-job: x86_64-msvc

Only try to modify file times of a writable file on Windows

Introduces a `set_file_times` helper which opens a given path as a file in r+w mode on Windows and then sets file times. Previously the file was open as read-only for Windows which caused permission errors locally.

This should hopefully make setting file times less error prone, since trying to set file times on read-only file on Windows also happened in rust-lang#127850.

try-job: dist-loongarch64-musl
try-job: x86_64-msvc