glibc: update to latest 2.31 commit [BZ #19519 BZ #26332 BZ #26248]

6fdf971c9d Add NEWS entry for CVE-2016-10228 (bug 19519)
70d585151c Rewrite iconv option parsing [BZ #19519]
1c8efe848b powerpc: Fix incorrect cache line size load in memset (bug 26332)
7611339a9b nptl: Zero-extend arguments to SETXID syscalls [BZ #26248]
21b760cc2f Disable warnings due to deprecated libselinux symbols used by nss and nscd

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

toolchain/glibc/common.mk

@@ -12,8 +12,8 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=6f3459f9859a7b506c64fa1823769ab631072c6e
-PKG_MIRROR_HASH:=01ed0c8131bdc32c9abd3aaaebc4fcffb2d496c2b8c363a0e845ac09d874a2ff
+PKG_SOURCE_VERSION:=6fdf971c9dbf7dac9bea552113fe4694015bbc4d
+PKG_MIRROR_HASH:=80998023c237bd0eaa38554e18536d8f66223e97fc5ade015a2d2aadf587d1f0
 PKG_SOURCE_URL:=https://sourceware.org/git/glibc.git
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz