BoardConfig.mk: add back kernel and arguments to make boot image
recovery.fstab: dekang recovery.fstab o_0
device_m7wls.mk: use LOCAL_PATH instead
device_m7wls.mk: dekang fstab.jet to fstab.m7wls
Boardconfig.mk: enable TARGET_USERIMAGES_USE_EXT4.

fixes flashing zip thru recovery.

Change-Id: I8f9a70684465e021e30a78cc2a9154cfa23e9705
m7wls: update missing file, ramdisk adn all teh things.

Change-Id: If3e7c54b84ffa6a48311a53a1616b8f07bf42158