Default [rom] cm7 pffmod

Original thread:

http://forum.xda-developers.com/showthread.php?t=996726

the author of this mod was gracious enough to submit it to the CM gerrit, so I have pulled those changes (http://review.cyanogenmod.com/#change,4055 and http://review.cyanogenmod.com/#change,4056) into my own builds.

I have tested this with several apps that use ads, and it works flawlessly.

builds can be found at http://xdafiles.net/rhcp/