vendor/custom: Backuptool files

This goes along with the releasetools enhancements in build/

Based on CyanogenMod 10.1, but debranded to generic naming for
easier sharing between community projects

Change-Id: I7031af3372a0bda31397e68761f772eccd4cb138

Conflicts:
	config/common.mk
Omni: Update backuptools version

Change-Id: I94ea75203b35a68b4580310f510e20b70fc2b204
Fix references to xp products
Fix reference to vendor/rascarlo
Custom init script support with Omni extras

Based on a stripped-down version of Cyanogenmod's initscript extras

Change-Id: I5d4dc3da437f6fe3a86d5dada563c1df8d20c902

Conflicts:
	config/common.mk
Clean up cruft in custom initscript extras

ANDROID_CACHE is only in CM's dalvik and we have yet to determine if
we want that feature

Also remove Omni branding

Change-Id: I9c02ed2a2376a1f0500d8f156929a8e511aa6db5