Software-accelerated Pixel Flinger

The typical graphic workloads on VirtualBox are improved 3X.

Supports both x86 and x86_64.

Similar change by HazouPH <jgrharbers@gmail.com>:
http://review.cyanogenmod.org/#/c/70896/

And by Quanganh pham <quanganh2627@gmail.com>:
http://review.cyanogenmod.org/#/c/97125/

Change-Id: I1cfd80f2951b801f0e10bf67b599a06a83e49089