Define recovery fstab

This has to be defined in order to build an otapackage
Conflicts:
	BoardConfig.mk
README.md: update build instructions

Signed-off-by: Alin Jerpelea <alin.jerpelea@sonymobile.com>
update kernel headers

Signed-off-by: Alin Jerpelea <alin.jerpelea@sonymobile.com>