Add specifics to armv7-a and armv7-a-neon

make sure build is compiling with mcpu march mtune. also
use ARCH_ARM_USE_D16 for VFP and add basic NEON fpu.

Change-Id: I2da6c1938eaddb303c931064a1f7067e4ca1c8e4
improve the HOST output

remove link time optimization for now

Change-Id: I929847c1efbeea3085e4759770dff1cbe769aa1a