Revert "update aospal optimization"

This reverts commit c278652de25216bdd6f8a4ccac48831ac609fa92.
update aospal optimization

Change-Id: I4f88431dae03afe4832d53fc3c0c49a2dc148943 (reverted from commit c278652de25216bdd6f8a4ccac48831ac609fa92)
Revert "update aospal optimization"

This reverts commit d6f99610036041821bae77e9898fe288466aa648.
set 4.8 as default gcc

Change-Id: I4c4b303905d86a342c7fbede142e45ba0c7c6b38
update flag

Change-Id: Icd312f2ce22ff29f1c3417af4ccb785bf2c81ea7