Auto-sync with upstream branch master
    
    Upstream commit: 9a08a366a7e7ddffe62113a9ffe5e50605ea0924
    
    - libnsl: Do not install libnsl.so, libnsl.a (#1531540)
    - Use unversioned Supplements: for langpacks (#1490725)
    - hu_HU locale: Avoid double space (swbz#22657)
    - math: Make default libc_feholdsetround_noex_ctx use __feholdexcept
      (swbz#22702)