cm: build custom tiles app

Change-Id: I861bccafe2a520d9061d1f636aac485db21cfb95
diff --git a/config/common.mk b/config/common.mk
index 1752b4c..fcb16a3 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -122,6 +122,7 @@
     AudioFX \
     CMSettingsProvider \
     CMUpdater \
+    CustomTiles \
     LineageSetupWizard \
     Eleven \
     ExactCalculator \