Bump kernel version to 0.505

Addition of new TWRP fstab implementation to allow ROM building

Change-Id: I6261513fee2ab407db3856c7a96fa25c3babf817
Bump kernel version to 0.506

Change-Id: If6c72c01ae036a792ca0b9afb4c6fa07ad045960
Bump kernel version to 0.507

Update to TWRP ramdisk

Change-Id: I651b10c1d34b5c252ed0d92eb112fa52c2879129