msm7x30-common: add gralloc_priv header

 * override the one in hardware to fix issues with our camera

Change-Id: Icd620a7402867974d82a4c3e55d1f2b58c853ba7
msm7x30: add flag BOARD_USES_PMEM_ADSP := true

 hardware/device tree patches needed:
 * http://review.evervolv.com/#/c/9689/
 * http://review.evervolv.com/#/c/10067/
 * http://review.evervolv.com/#/c/10078/
 * http://review.evervolv.com/#/c/10325/

 kernel patches needed:
 * http://review.evervolv.com/#/c/9824/
 * http://review.evervolv.com/#/c/9853/
 * http://review.evervolv.com/#/c/9854/
 * http://review.evervolv.com/#/c/10326/
 * http://review.evervolv.com/#/c/10327/

Change-Id: Ie6822e01230a140d5f9b24d4b1f6ee0c28e5cc43