mknative-gcc for gcc 9.3.0 and arm, earmv[467]*, i386, mipseb, mips64*,
and powerpc64.

mknative gcc 6.4 and powerpc / earmv4. earmv4 seems to work.
powerpc not properly tested yet, but builds.

merge GCC 4.8 build.

gcc configury for earmv4, earmv6, earmv6hf, earmv7, earmv7hf