build: don't clear recovery ramdisk

Clearing recovery ramdisk removes all files place there by the
device tree and all busybox symlinks placed there by recovery

Change-Id: I19e6164856a01a83a6e2c50ef96742edcb9f570f

Conflicts:
	core/Makefile
Allow Device specific ramdisk address

Change-Id: If0bb3d3a2b51f87a92c0b657fbc6d0277ce53532

Conflicts:
	core/Makefile
Disable Pinyin and Openwnn IME's by default.
These two IME's are of poor quality and nobody actually uses them.
A device that caters to those markets may choose to enable these IME's,
They are more likely to instead install one of the better free IME's
from Android Market.

Change-Id: I33d8340dcae997fb37f00d841619353cf2835d30