Auto-sync with upstream branch master
    
    Upstream commit: a55430cb0e261834ce7a4e118dd9e0f2b7fb14bc
    
    - elf: Properly compute offsets of note descriptor and next note (swbz#22370)
    - cs_CZ locale: Base collation on iso14651_t1 (swbz#22336)
    - Implement the mlock2 function
    - Add _Float64x function aliases
    - elf: Consolidate link map sorting
    - pl_PL locale: Base collation on iso14651_t1 (swbz#22469)
    - nss: Export nscd hash function as __nss_hash (swbz#22459)