Auto-sync with upstream branch master
    
    Upstream commit: 4df1fa6ddc8925a75f3da644d5da3bb16eb33f02
    
    - x86-64: Use notl in EVEX strcmp (#2026399)
    - nptl: Increase default TCB alignment to 32
    - elf: add definition for ELF_NOTE_FDO and NT_FDO_PACKAGING_METADATA note
    - AArch64: Improve A64FX memcpy
    - AArch64: Optimize memcmp
    - powerpc64[le]: Fix CFI and LR save address for asm syscalls [BZ #28532]
    - linux: Implement pipe in terms of __NR_pipe2
    - linux: Implement mremap in C
    - linux: Add prlimit64 C implementation
    - elf: Include <stdbool.h> in tst-tls20.c
    - elf: Include <stdint.h> in tst-tls20.c
    - hurd: Let report-wait use a weak reference to _hurd_itimer_thread