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
backuptool: Change version to 5.0

Change-Id: Ib5c1c7ee110168446a2e3277f920ef081e8b23a7

Conflicts:
	prebuilt/common/bin/backuptool.sh
Update all build fingerprints

Conflicts:
	simpleaosp/products/simpleaosp_flo.mk
	simpleaosp/products/simpleaosp_hammerhead.mk
	simpleaosp/products/simpleaosp_mako.mk