gcc 4.8.1 fixes, optimization flags
	modified:   Makefile
	modified:   arch/arm/Makefile
	modified:   arch/arm/configs/purified_test_mako_defconfig
	modified:   arch/arm/vfp/Makefile
	modified:   init/Kconfig
add config for gcc 4.7
	new file:   arch/arm/configs/purified_mako_defconfig
Update config for gcc 4.7.4 (temporary)
	modified:   Makefile
	modified:   arch/arm/configs/purified_mako_defconfig
fix + git dirty kernel version
fix scripts/mkcompile_h