[CLEANUP] product branch update

today I've noticed that the stats page still displays v1.3 in the
"Updates" link, due to the PRODUCT_BRANCH value in version.h, then
it's maybe time to send you the result (notice that the patch updates
PRODUCT_BRANCH to "1.4").

--
Cyril Bonté
diff --git a/include/common/version.h b/include/common/version.h
index c9f5f16..a869231 100644
--- a/include/common/version.h
+++ b/include/common/version.h
@@ -33,7 +33,7 @@
 #ifdef  CONFIG_PRODUCT_BRANCH
 #define PRODUCT_BRANCH    CONFIG_PRODUCT_BRANCH
 #else
-#define PRODUCT_BRANCH   "1.3"
+#define PRODUCT_BRANCH   "1.4"
 #endif
 
 #ifdef  CONFIG_PRODUCT_URL