Bump to 6.7

Change-Id: I6f04ad7fd164cac16193df32c5ac2480628be5b7
Signed-off-by: Josue Rivera <prbassplayer@gmail.com>
diff --git a/config/common.mk b/config/common.mk
index dd87538..2db0d9d 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -158,7 +158,7 @@
 # KitKat SlimKat freeze code
 PRODUCT_VERSION_MAJOR = 4.4.4
 PRODUCT_VERSION_MINOR = build
-PRODUCT_VERSION_MAINTENANCE = 6.6
+PRODUCT_VERSION_MAINTENANCE = 6.7
 ifdef SLIM_BUILD_EXTRA
     SLIM_POSTFIX := -$(SLIM_BUILD_EXTRA)
 endif