add GCC 4.2.3

toolchain/gcc/Config.in

toolchain/gcc/Config.version

toolchain/gcc/patches/4.2.3/100-uclibc-conf.patch

toolchain/gcc/patches/4.2.3/103-uclibc-conf-noupstream.patch

toolchain/gcc/patches/4.2.3/200-uclibc-locale.patch

toolchain/gcc/patches/4.2.3/203-uclibc-locale-no__x.patch

...chain/gcc/patches/4.2.3/204-uclibc-locale-wchar_fix.patch

toolchain/gcc/patches/4.2.3/205-uclibc-locale-update.patch

toolchain/gcc/patches/4.2.3/300-libstdc++-pic.patch

toolchain/gcc/patches/4.2.3/301-missing-execinfo_h.patch

toolchain/gcc/patches/4.2.3/302-c99-snprintf.patch

toolchain/gcc/patches/4.2.3/303-c99-complex-ugly-hack.patch

toolchain/gcc/patches/4.2.3/304-index_macro.patch

...chain/gcc/patches/4.2.3/305-libmudflap-susv3-legacy.patch

toolchain/gcc/patches/4.2.3/306-libstdc++-namespace.patch

toolchain/gcc/patches/4.2.3/307-locale_facets.patch

...ain/gcc/patches/4.2.3/402-libbackend_dep_gcov-iov.h.patch

toolchain/gcc/patches/4.2.3/800-arm-bigendian.patch

toolchain/gcc/patches/4.2.3/900-avr32_support.patch

toolchain/gcc/patches/4.2.3/901-avr32_add_mno-pic.patch