Fix bluetooth on Nexus 7

Change-Id: I409fc3775fa3825ff3c8238b1560a6ed6b37d511
Proper GCC config

Change-Id: Ibab6e94e0e3cae30b45157b524ca02e20f96e3a2
Some devices hate -O3

Change-Id: Id6e8d696956189a0b56509d6cc1e748ccf343b90