omni: set default for ROM_BUILDTIME_UTC

default for official builds

Change-Id: I72198c90a495883481df36b0d8995ddac4e41b44
diff --git a/config/version.mk b/config/version.mk
index 8abde6e..b486cb3 100644
--- a/config/version.mk
+++ b/config/version.mk
@@ -1,7 +1,11 @@
 # Versioning of the ROM
 
 ifndef ROM_BUILDTYPE
-    ROM_BUILDTYPE := HOMEMADE
+    ROM_BUILDTYPE := WEEKLY
+endif
+
+ifndef ROM_BUILDTIME_UTC
+    ROM_BUILDTIME_UTC := y
 endif
 
 ifndef ROM_BUILDTIME_WITH_TIME