Add markdown syntax.

Change-Id: Idaba6c81356e78f73d2c0c5e998952fc5646bf85
diff --git a/_samsung/samsunggalaxyj5prime.markdown b/_samsung/samsunggalaxyj5prime.markdown
index 3ed3462..b056851 100644
--- a/_samsung/samsunggalaxyj5prime.markdown
+++ b/_samsung/samsunggalaxyj5prime.markdown
@@ -1,3 +1,4 @@
+---
 layout: device
 title: "Samsung Galaxy J5 Prime"
 codename: on5xelte