Add some optimization flags

Change-Id: I1543cb2ca9fb412545439616144110e083a6ca56
Don't compile Music app

Change-Id: I4f56de4e463973739795e5658dd635c18eb50665
Removed Stock Browser, need only libwebcore

Change-Id: Ia97a93f323c4899c4fe1165a9ded1fda44d0b65c