build: Add support for Luxembourgish

Change-Id: I0fb6d8f8a33f209d5593f133c2e891fe9be102c2
releasetools: use variable instead of fixed name for bootable image

When building for a device with a custom bootimage makefile, this
would cause the boot image to be used as the recovery image during
fastboot zip creation.

Change-Id: I075cfe4e9a2a8384d3767de351ec7f751f3e95ab
build: Disable Punjabi & Sinhala languages

* These languages do not render properly.
Disable them until we fix the issue

Change-Id: I04f26ab4146925661a4a5b97308eb919c5dc1de2
releasetools: Add radio images to fastboot packages

Fastboot packages should include radio images, if they exist. Also
generate a flash-radio.sh file if a filesmap file exists to indicate
the partition that a radio image should be flashed to.

Change-Id: Ic3392cc76407408b98aad00f36f4dfa3b9be176b
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_build into cm-11.0