Merge pull request #495 from adierking/test-all-the-things

tests: port dispatch_io and dispatch_io_pipe_close to Windows
Signed-off-by: Kim Topley <[email protected]>

Author: ktopley-apple

PATCHES

@@ -512,3 +512,4 @@ github commits starting with 29bdc2f from
 [52bc6b2] APPLIED rdar://54572081
 [4169c8d] APPLIED rdar://54572081
 [318f6e5] APPLIED rdar://54572081
+[6a36af8] APPLIED rdar://54572081