copy vendor/cm/bootimage/Android.mk to kernel/

Change-Id: I62dd0f89403dc032dd8d6359cee702b7ba58e87e
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android into cm-11.0

Conflicts:
	default.xml

Change-Id: I0ada77f1407846fb1de4d9793ba3bb305a90aee9