Updates for cm-10.2
this is a squash of a load of commits from github/nightlies/

  4.2.2 blobage upgrade
  remove usb otg from storage list
  re-add BOARD_USES_GENERIC_AUDIO := false
  remove usb audio
  Enable support for mHeap-based screenshots
  unify fstab and enable fstabv2
  removing the need for out init.rc
  removing our init.rc
  moving pollyd to tegra3-commons
  Removed Pollyd > T3-commons

Change-Id: I9eb6bcf935cc213775007416c0df7bc1a640ffec