Auto-sync with upstream branch master
Upstream commit: cb7e7a5ca1d6d25d59bc038bdc09630e507c41e5
- nptl: Handle NULL abstime [BZ #26394]
- Update build-many-glibcs.py for binutils ia64 obsoletion.
- Update kernel version to 5.8 in tst-mman-consts.py.
- y2038: nptl: Convert pthread_{clock|timed}join_np to support 64 bit time
- aarch64: update ulps.