Massive Update

- GCC 4.8 support
- Optimized flags from Linaro
- Added an option to disable strict aliasing
- Clang support
- Dumpvar: Show target_tools_prefix
- GNU Make 4.0 support
- more

Thanks Linaro Team
TARGET_thumb_CFLAGS: Set -O2
Merge remote-tracking branch 'purity/kitkat' into purity

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	core/combo/TARGET_linux-arm.mk
	core/combo/arch/arm/armv7-a-neon.mk
	core/combo/select.mk