Auto-sync with upstream branch master
    
    Upstream commit: 7f1a08cff82255cd4252a2c75fd65b80a6a170bf
    
    - Move NEWS entry for CVE-2020-1751 to the 2.31 section
    - NEWS: Deprecate weak libpthread symbols for single-threaded checks
    - NEWS: Deprecate nss_hesiod
    - nptl: Zero-extend arguments to SETXID syscalls [BZ #26248]
    - Use binutils 2.35 branch in build-many-glibcs.py.
    - aarch64: Use future HWCAP2_MTE in ifunc resolver
    - Update x86-64 libm-test-ulps
    - aarch64: Respect p_flags when protecting code with PROT_BTI
    - Disable warnings due to deprecated libselinux symbols used by nss and nscd
    - Regenerate INSTALL for ARC port updates.
    - Update libc.pot for 2.32 release.
    - powerpc: Fix POWER10 selection
    - powerpc64le: guarantee a .gnu.attributes section [BZ #26220]