add a gcc 4.2 snapshot

toolchain/gcc/Config.in

toolchain/gcc/Config.version

toolchain/gcc/Makefile

toolchain/gcc/patches/4.2/100-uclibc-conf.patch

toolchain/gcc/patches/4.2/103-uclibc-conf-noupstream.patch

toolchain/gcc/patches/4.2/200-uclibc-locale.patch

toolchain/gcc/patches/4.2/203-uclibc-locale-no__x.patch

toolchain/gcc/patches/4.2/204-uclibc-locale-wchar_fix.patch

toolchain/gcc/patches/4.2/205-uclibc-locale-update.patch

toolchain/gcc/patches/4.2/300-libstdc++-pic.patch

toolchain/gcc/patches/4.2/301-missing-execinfo_h.patch

toolchain/gcc/patches/4.2/302-c99-snprintf.patch

toolchain/gcc/patches/4.2/303-c99-complex-ugly-hack.patch

toolchain/gcc/patches/4.2/304-index_macro.patch

toolchain/gcc/patches/4.2/800-arm-bigendian.patch