fix gcc4.7 compile

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>

Conflicts:

	arch/arm/boot/compressed/Makefile
Makefile: adding config variable for Os/O2/O3 compilation

Conflicts:

	init/Kconfig

Conflicts:
	Makefile
Makefile: Added Snapdragon optimizations

Conflicts:

	Makefile
Makefile: Optimizing build-options for linaro