aac: disable -O3, breaks build with GCC 4.9
Signed-off-by: Paul Beeler <sparksco@gmail.com>

Change-Id: I45edeae0912ea3c2ab12b4ab42997605074b1221
Merge tag 'android-4.3_r2.1' of https://android.googlesource.com/platform/external/aac into sm-jb-mr2

Android 4.3 release 2.1