Auto-sync with upstream branch master
    
    Upstream-commit: cdf645427d176197b82f44308a5e131d69fb53ad
    
    - glibc-rh741105.patch: Adjust after rebase.
    - glibc-fix-float128-benchtests.patch: Add to allow building on armv7hl.
    - Update mallinfo2 ABI, and test
    - Allow memset local PLT reference for RISC-V.
    - powerpc: fix ifunc implementation list for POWER9 strlen and stpcpy
    - nscd: bump GC cycle during cache pruning (bug 26130)
    - x86: Use HAS_CPU_FEATURE with IBT and SHSTK [BZ #26625]
    - <sys/platform/x86.h>: Add Intel Key Locker support
    - Fix handling of collating symbols in fnmatch (bug 26620)
    - pselect.c: Pass a pointer to SYSCALL_CANCEL [BZ #26606]
    - y2038: nptl: Convert sem_{clock|timed}wait to support 64 bit time
    - hurd: Add __x86_get_cpu_features to ld.abilist
    - x86: Install <sys/platform/x86.h> [BZ #26124]
    - linux: Add time64 pselect support
    - linux: Add time64 semtimedop support
    - linux: Add ppoll time64 optimization
    - linux: Simplify clock_getres
    - Update sparc libm-test-ulps
    - Remove internal usage of extensible stat functions
    - Linux: Consolidate xmknod
    - linux: Consolidate fxstatat{64}
    - linux: Consolidate fxstat{64}
    - linux: Consolidate lxstat{64}
    - linux: Consolidate xstat{64}
    - linux: Define STAT64_IS_KERNEL_STAT64
    - linux: Always define STAT_IS_KERNEL_STAT
    - Update powerpc libm-test-ulps
    - benchtests: Add "workload" traces for sinf128
    - benchtests: Add "workload" traces for sinf
    - benchtests: Add "workload" traces for sin
    - benchtests: Add "workload" traces for powf128
    - benchtests: Add "workload" traces for pow
    - benchtests: Add "workload" traces for expf128
    - benchtests: Add "workload" traces for exp
    - nptl: futex: Provide correct indentation for part of
      __futex_abstimed_wait_cancelable64