K 10
svn:author
V 6
jbeich
K 8
svn:date
V 27
2017-07-04T13:47:46.252551Z
K 7
svn:log
V 306
x11/libxshmfence: don't leak /tmp/shmfd* files with O_CLOEXEC

- Both mkostemp() and mkstemp() need explicit call to unlink()
- Unobfuscate fallback if both O_TMPFILE and mksotemp() are N/A
- O_TMPFILE (Linux-only) appeared after O_CLOEXEC, no need to check

PR:		217676 (for tracking)
MFH:		2017Q3 2017Q2

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