Merge pull request #216 from dgrove-oss/das-darwin-libdispatch-806-merge-master-linux-fixes

Linux fixes for dispatch-806 merge

Signed-off-by: Daniel A. Steffen <dsteffen@apple.com>

Author: das

PATCHES

@@ -313,3 +313,4 @@ github commits starting with 29bdc2f from
 [ba4cac5] APPLIED rdar://30568673
 [7974138] APPLIED rdar://30568673
 [cd12dcb] APPLIED rdar://32283666
+[ff05109] APPLIED rdar://32283666