LTO misc + cortex-a9 target

Change-Id: Ied17535ecd0049a452086ee620446f6d505f0664
Add neon flag + default to cortex-a9 if not set

Change-Id: Ic5d6287555b7c3f3e66eae0d3040f1b23243e43d
clang -O3

Change-Id: Ia8e985d15564099f87364f24d4a69c955632a7b2
default to cortex-a9 if not set

Change-Id: I56f57ab39782f40e0bb3c1d6da14461ef8db6019
cleanup

Change-Id: I01917962b75fb0b795694de80875fb556809f6d5