Revert "configs: update media_profiles.xml for MR2"

This was causing the camera to FC when stopping a recording

This reverts commit 5d47c5b5b515e479bbd855007cb695d583c923e9.
BoardConfig: bring back disable arm pie flag.

We now have a working gcc-4.7 toolchain that allows compiling with this.

This fixes pretty much about every recent bug we have been having with
the camera

Change-Id: I5bf4568df42f44736eee6ecd736c9760d3707e55