Don't use fence sync for qcom legacy

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

This reverts commit cbc98d220e1b8698da45ae628d9a7161236a9334.
Merge remote-tracking branch 'CyanogenMod/cm-10.1' into cm-10.1