Makefile: default toolchain and makefile tweaks
Makefile: flags optimization
makefile: tweak ccache
makefile: arm-cortex_a15-linux-gnueabihf-linaro_4.9.1-2014.05 toolchain
makefile: tuen flags
makefile: tune flags #2
makefile: update flags #3 - graphite
makefile: fix toolchains path
Makefile: New Graphite Flag
* This flag was discovered and shared with me by Paul Beeler

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