gcc 11.1.0

gcc 11.1.0: https://ftp.gnu.org/gnu/gcc/gcc-11.1.0/gcc-11.1.0.tar.xz
binutils 2.36.1: https://ftp.gnu.org/gnu/binutils/binutils-2.36.1.tar.xz
mingw-w64 4.06: https://github.com/mirror/mingw-w64/releases/tag/v4.0.6
gmp 4.3.2: https://ftp.gnu.org/gnu/gmp/gmp-4.3.2.tar.bz2
mpfr 3.1.6: https://ftp.gnu.org/gnu/mpfr/mpfr-3.1.6.tar.xz
mpc 1.0.3: https://ftp.gnu.org/gnu/mpc/mpc-1.0.3.tar.gz