Upstream commit: 387bff63dc2dccd62b09aa26dccf8cdc5f3c985c
- powerpc64[le]: Fix CFI and LR save address for asm syscalls [BZ #28532]
- linux: Use /proc/stat fallback for __get_nprocs_conf (BZ #28624)
- nptl: Do not set signal mask on second setjmp return [BZ #28607]
- s390: Use long branches across object boundaries (jgh instead of jh)
- elf: Earlier missing dynamic segment check in _dl_map_object_from_fd
- gconv: Do not emit spurious NUL character in ISO-2022-JP-3 (bug 28524)
