build: Add support for Luxembourgish

Change-Id: I0fb6d8f8a33f209d5593f133c2e891fe9be102c2
Merge branch 'cm-11.0' into kk_mkt

Conflicts:
	target/product/languages_full.mk
	target/product/locales_full.mk

Change-Id: I6b718658390c403b213ea1aed9a345ee85ab5bc2