+ Also update gcc-multilib to gcc-4.9.3
Trying to build `gcc-multilib` failed because `glibc-32bit`
has no separate `srcpkg/glibc-32bit/template`, but is a
result of building `glibc` for target arch `i686`.
For gcc-4.9.3 to build a patch is required that gets us rid
of strange errors when including /usr/include/bits/stdio2.h