Don't use fence sync for qcom legacy

Change-Id: Ice64233a25edee763a36a3ba34230d1360a0d610
Revert "Revert "libgui: Use fences for all QCOM targets""

This reverts commit 4811833645b009f1fc7874b28ffa3be144a42e96.
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_frameworks_native into HEAD