add support for gcc 4.7.0 - thanks to acoul!

toolchain/gcc/Config.in

toolchain/gcc/Config.version

toolchain/gcc/common.mk

toolchain/gcc/patches/4.7.0/100-uclibc-conf.patch

toolchain/gcc/patches/4.7.0/301-missing-execinfo_h.patch

toolchain/gcc/patches/4.7.0/302-c99-snprintf.patch

...chain/gcc/patches/4.7.0/305-libmudflap-susv3-legacy.patch

toolchain/gcc/patches/4.7.0/600-ubicom_support.patch

toolchain/gcc/patches/4.7.0/810-arm-softfloat-libgcc.patch

toolchain/gcc/patches/4.7.0/820-libgcc_pic.patch

toolchain/gcc/patches/4.7.0/830-arm_unbreak_armv4t.patch

...ain/gcc/patches/4.7.0/840-armv4_pass_fix-v4bx_to_ld.patch

toolchain/gcc/patches/4.7.0/870-ppc_no_crtsavres.patch

toolchain/gcc/patches/4.7.0/910-mbsd_multi.patch

...cc/patches/4.7.0/993-arm_insn-opinit-RTX_CODE-fixup.patch

toolchain/gcc/patches/4.7.0/999-coldfire.patch