Build - Note that update-api is a lie.

Change-Id: Ia411c416f616119017322d15452578b692a64af7
Signed-off-by: STELIX <ssspinni@gmail.com>
Build - Modular backuptool.sh.  Executes backup and restore methods defined in arbitrary /system/addon.d/*.sh scripts.

* Copy backuptool.functions alongside backuptool.sh.
* Delete both from /system/bin as they are not useful there.

Patch Series
============
http://review.cyanogenmod.com/#change,13265
CyanogenMod/android_build
* edify generator
http://review.cyanogenmod.com/#change,13266
CyanogenMod/android_system_core
* permissions on /system/addon.d
http://review.cyanogenmod.com/#change,13267
CyanogenMod/android_vendor_cm
* 50-cm.sh reference backup script
* modular backuptool.sh
* support backuptool.functions used by /system/addon.d/*.sh scripts

Change-Id: I230e4e22c50bcb9fe3f9044cd698cf45878fdf7c
Signed-off-by: STELIX <ssspinni@gmail.com>