Merging r351670:
------------------------------------------------------------------------
r351670 | ericwf | 2019-01-20 02:21:35 +0100 (Sun, 20 Jan 2019) | 7 lines
Fix aligned allocation availability XFAILs after D56445.
D56445 bumped the minimum Mac OS X version required for aligned
allocation from 10.13 to 10.14. This caused libc++ tests depending
on the old value to break.
This patch updates the XFAILs for those tests to include 10.13.
------------------------------------------------------------------------
llvm-svn: 351980