Auto-sync with upstream branch master
    
    Upstream commit: 4612268a0ad8e3409d8ce2314dd2dd8ee0af5269
    
    - Correct the list of static PIE architectures
    - glibc_post_upgrade: Remove process restart logic
    - glibc_post_upgrade: Integrate into the build process
    - glibc_post_upgrade: Do not clean up tls subdirectories
    - glibc_post_upgrade: Drop ia64 support
    - Remove architecture-specific symbolic link for iconvconfig
    - powerpc: Fix syscalls during early process initialization (swbz#22685)