Merge pull request #461 from tachoknight/master

Added underscores to gettid(void) to remove name clash

Signed-off-by: Kim Topley <ktopley@apple.com>

Author: ktopley-apple

PATCHES

@@ -480,3 +480,4 @@ github commits starting with 29bdc2f from
 [f20349f] APPLIED rdar://54572081
 [ef9364c] APPLIED rdar://54572081
 [9d485ca] APPLIED rdar://54572081
+[cbd70d1] APPLIED rdar://54572081