force hardware graphics even if there's less than 512M ram present

see http://review.androidarmv6.org/#/c/5983/
update patches
add patches to fixup Basic live wallpaper code & texture loading and to re-enable most
patches to fix renderscript on armv6
enable building most of the old live wallpapers
no need to include gsm.mk now

see http://review.cyanogenmod.org/#/c/52265/