musl: Update to tip

musl: Update to tip

Rich Felker (2):
      fix padding string formats to width in wide printf variants
      fix outdated pathnames in COPYRIGHT file

Szabolcs Nagy (7):
      deduplicate bits/mman.h
      mips64: add recent linux syscall numbers
      add copy_file_range syscall numbers from linux v4.5
      add IPV6_HDRINCL socket option from linux v4.5
      add SO_ATTACH_REUSEPORT_[CE]BPF socket options from linux v4.5
      add EPOLLEXCLUSIVE epoll flag from linux v4.5
      add MADV_FREE madvise command from linux v4.5

Timo Teräs (1):
      fix gethostbyaddr_r to fill struct hostent.h_length as appropriate

updated paths in copyright text

see http://git.musl-libc.org/cgit/musl/commit/?id=dc4520d9c0b79bc5944f509e4e9061e5081e38ca

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>