vendor: adjust for weekly builds

enable WITH_DEXPREOPT for weeklies too

Change-Id: I796ffd009b040cde229f18a9ecff11e33ebed2c6
diff --git a/config/common.mk b/config/common.mk
index d5a4841..865182f 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -74,3 +74,7 @@
 ifeq ($(ROM_BUILDTYPE),NIGHTLY)
     WITH_DEXPREOPT := true
 endif
+# and weeklies
+ifeq ($(ROM_BUILDTYPE),WEEKLY)
+    WITH_DEXPREOPT := true
+endif