Move build-image-kernel-modules out of recovery macro

build-image-kernel-modules is defined under recovery macro
when build without recovery,the driver kos are not packed
into the vendor image

Test: build with TARGET_NO_RECOVERY on and set ko to be build
in BOARD_VENDOR_KERNEL_MODULES to see if kos are packed into
vendor image

Change-Id: I162ccb2fe50c09ece07b6b07e416721985228006