musl: Added musl 0.9.12 - A lightweight implementation of a standard C library
musl: fixed libtool cross-compiling at stage 1
musl: fixed m4 to cross-compile and to workaround gnulib weirdness

Note:

If you see something like this while trying to build a package using musl libc
this kind of fix might also apply for that package!

------------------------------------------------------------------------------
freadahead.c: In function 'freadahead':
freadahead.c:83:3: error: #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, th en report this to bug-gnulib."
------------------------------------------------------------------------------
musl: fixed gcc patch to apply on top of the multilib patch applied when building a 64bit target

The multilib patch 'base/gcc/gcc-4.7-multilib-1.patch' is for adjusting
multilib dirnames to suite OpenSDE's lib as symlink strategy.
musl: provide proper credits and infos about the gcc patch
musl: fixed openssl to use termios.h