add initial S5(klte) common files

Change-Id: I79c70b7e6599cdeffe5dbd0ac88d276dac2b7abb
add initial kltevzw support

Change-Id: I4fbba3d790e4f50f2fc0f43fe6e551e751a1409e
Merge branch 'twrp2.7-safestrap' of github.com:Hashcode/android_bootable_recovery into twrp2.7-safestrap