bpo-36894: Fix regression in test_multiprocessing_spawn (no tests run…

bpo-36894: Fix regression in test_multiprocessing_spawn (no tests run… · python/cpython@95da83d

Original file line number	Diff line number	Diff line change
`@@ -20,8 +20,6 @@`
`20`	`20`	`import sys`
`21`	`21`	`import threading`
`22`	`22`	`import warnings`
`23`		`-import _multiprocessing`
`24`		`-import _posixshmem`
`25`	`23`
`26`	`24`	`from . import spawn`
`27`	`25`	`from . import util`
`@@ -33,10 +31,17 @@`
`33`	`31`
`34`	`32`	`_CLEANUP_FUNCS = {`
`35`	`33`	`'noop': lambda: None,`
`36`		`-'semaphore': _multiprocessing.sem_unlink,`
`37`		`-'shared_memory': _posixshmem.shm_unlink`
`38`	`34`	`}`
`39`	`35`
	`36`	`+if os.name == 'posix':`
	`37`	`+import _multiprocessing`
	`38`	`+import _posixshmem`
	`39`	`+`
	`40`	`+_CLEANUP_FUNCS.update({`
	`41`	`+'semaphore': _multiprocessing.sem_unlink,`
	`42`	`+'shared_memory': _posixshmem.shm_unlink,`
	`43`	`+ })`
	`44`	`+`
`40`	`45`
`41`	`46`	`class ResourceTracker(object):`
`42`	`47`