Auto-sync with upstream branch master
Upstream commit: 797ba44ba27521261f94cc521f1c2ca74f650147
- CVE-2017-15670: glob: Fix one-byte overflow (#1504807)
- math: Add bits/floatn.h defines for more _FloatN / _FloatNx types
- posix: Fix improper assert in Linux posix_spawn (swbz#22273)
- x86-64: Use fxsave/xsave/xsavec in _dl_runtime_resolve (swbz#21265)
- malloc: Add single-threaded path to _int_free
- locale: Add new locale kab_DZ (swbz#18812)
- locale: Add new locale shn_MM (swbz#13605)