tempname: resync from glibc * lib/tempname.c (__gen_tempname): Add suffixlen argument. Use same values for __GT_FILE as glibc. Abort even when assertions are disabled. * lib/tempname.h (GT_FILE): Use glibc __GT_FILE, if available, and match its value otherwise. Allow idempotent inclusion. * lib/mkdtemp.c (mkdtemp): Adjust caller. * lib/mkostemp.c (mkostemp): Likewise. * lib/mkstemp.c (mkstemp): Likewise. * lib/tmpfile.c (tmpfile): Likewise. * NEWS: Document this. Signed-off-by: Eric Blake <ebb9@byu.net>