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
Added BOARD_EGL_CFG to BoardConfig

Change-Id: I5fa64eb8986497cbb3c8b1906f80b525defb1036
enrc2b: added missing cm.dependencies

Change-Id: I30bc78a41e524791bd5d19fa37eb5a46f89da0f7
	modified:   ramdisk/init.enrc2b.rc

Change-Id: If3c7cb8b22400e1d483574db313e33fa01ef1be6