Add overlays

* Use a high priority to override other rro overlays

setup-makefiles.sh

@@ -49,6 +49,15 @@ echo "ifeq (\$(TARGET_IS_GROUPER),)" >> "$PRODUCTMK"
 write_makefiles "$MY_DIR"/proprietary-files-common-nongrouper.txt
 echo "endif" >> "$PRODUCTMK"
 
+# Overlays
+cd overlay
+OVERLAYS=$(for dir in $(ls -d */); do echo ${dir%%/}; done)
+OVERLAYS=$(echo $OVERLAYS | paste -s -d ' ')
+cd - >/dev/null
+printf "\n" >> "$PRODUCTMK"
+echo "PRODUCT_SOONG_NAMESPACES += vendor/$VENDOR/overlay" >> "$PRODUCTMK"
+echo "PRODUCT_PACKAGES += $OVERLAYS" >> "$PRODUCTMK"
+
 sed -i 's/TARGET_DEVICE/TARGET_ARCH/g' "$ANDROIDMK"
 
 # We are done with common