Don't test panic=unwind in panic_main.rs on Fuchsia

`@Enselic` added a few new test conditions to tests/ui/panics/panic-main.rs in rust-lang#142304, but it is unfortunately causing the test to fail for Fuchsia with the `panic=unwind` modes since we compile Rust for Fuchsia with `panic=abort`. This patch just ignores the test for Fuchsia.

Note that this test might also need to filter out a few other platforms, since another panicking test we exclude from Fuchsia https://github.com/rust-lang/rust/blob/master/tests/ui/panics/runtime-switch.rs also excludes running on msvc, android, openbsd, and wasm, but I'm not familiar with those platforms so I didn't want to add them here.

cc `@compile-errors,` who reviewed the initial PR

Don't test panic=unwind in panic_main.rs on Fuchsia

``@Enselic`` added a few new test conditions to tests/ui/panics/panic-main.rs in rust-lang#142304, but it is unfortunately causing the test to fail for Fuchsia with the `panic=unwind` modes since we compile Rust for Fuchsia with `panic=abort`. This patch just ignores the test for Fuchsia.

Note that this test might also need to filter out a few other platforms, since another panicking test we exclude from Fuchsia https://github.com/rust-lang/rust/blob/master/tests/ui/panics/runtime-switch.rs also excludes running on msvc, android, openbsd, and wasm, but I'm not familiar with those platforms so I didn't want to add them here.

cc ``@compile-errors,`` who reviewed the initial PR

Don't test panic=unwind in panic_main.rs on Fuchsia

```@Enselic``` added a few new test conditions to tests/ui/panics/panic-main.rs in rust-lang#142304, but it is unfortunately causing the test to fail for Fuchsia with the `panic=unwind` modes since we compile Rust for Fuchsia with `panic=abort`. This patch just ignores the test for Fuchsia.

Note that this test might also need to filter out a few other platforms, since another panicking test we exclude from Fuchsia https://github.com/rust-lang/rust/blob/master/tests/ui/panics/runtime-switch.rs also excludes running on msvc, android, openbsd, and wasm, but I'm not familiar with those platforms so I didn't want to add them here.

cc ```@compile-errors,``` who reviewed the initial PR

Rollup of 10 pull requests

Successful merges:

 - #141076 (fix Zip unsoundness (again))
 - #142444 (adding run-make test to autodiff)
 - #143704 (Be a bit more careful around exotic cycles in in the inliner)
 - #144073 (Don't test panic=unwind in panic_main.rs on Fuchsia)
 - #144083 (miri sleep tests: increase slack)
 - #144092 (bootstrap: Detect musl hosts)
 - #144098 (Do not lint private-in-public for RPITIT)
 - #144103 (Rename `emit_unless` to `emit_unless_delay`)
 - #144108 (Ignore tests/run-make/link-eh-frame-terminator/rmake.rs when cross-compiling)
 - #144115 (fix outdated comment)

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

Rollup merge of #144073 - erickt:ignore-test-on-fuchsia, r=lqd

Don't test panic=unwind in panic_main.rs on Fuchsia

````@Enselic```` added a few new test conditions to tests/ui/panics/panic-main.rs in #142304, but it is unfortunately causing the test to fail for Fuchsia with the `panic=unwind` modes since we compile Rust for Fuchsia with `panic=abort`. This patch just ignores the test for Fuchsia.

Note that this test might also need to filter out a few other platforms, since another panicking test we exclude from Fuchsia https://github.com/rust-lang/rust/blob/master/tests/ui/panics/runtime-switch.rs also excludes running on msvc, android, openbsd, and wasm, but I'm not familiar with those platforms so I didn't want to add them here.

cc ````@compile-errors,```` who reviewed the initial PR

Don't test panic=unwind in panic_main.rs on Fuchsia

````@Enselic```` added a few new test conditions to tests/ui/panics/panic-main.rs in rust-lang#142304, but it is unfortunately causing the test to fail for Fuchsia with the `panic=unwind` modes since we compile Rust for Fuchsia with `panic=abort`. This patch just ignores the test for Fuchsia.

Note that this test might also need to filter out a few other platforms, since another panicking test we exclude from Fuchsia https://github.com/rust-lang/rust/blob/master/tests/ui/panics/runtime-switch.rs also excludes running on msvc, android, openbsd, and wasm, but I'm not familiar with those platforms so I didn't want to add them here.

cc ````@compile-errors,```` who reviewed the initial PR