cross-arm-linux-gnueabihf: enable lto; update binutils to 2.24.
cross-arm-linux-gnueabihf: use host gmp/mpfr/mpc libs; update binutils to 2.24.
cross-i686-pc-linux-gnu: use host gmp/mpfr/mpc libs; update binutils to 2.24.
cross-arm-linux-gnueabihf: remove unused vars; update maintainer.
cross-i686-pc-linux-gnu: update binutils checksum.
cross-i686-pc-linux-gnu: fix build.
cross-mipsel-softfloat-linux-gnu: use host gmp/mpfr/mpc libs; update toolchain.
cross-mips-softfloat-linux-gnu: use host gmp/mpfr/mpc libs; update toolchain.
cross-mipsel-softfloat-linux-gnu: update maintainer.
llvm: add patch to workaround GCC internal compiler error in cross builds.