build: fix comma in build files

Change-Id: I7e1676c5dadc22a8bac63706b196625e152549ef
diff --git a/BUILD b/BUILD
index 2e729fa..2bb66d9 100644
--- a/BUILD
+++ b/BUILD
@@ -782,7 +782,7 @@
 py_binary(
     name = "gen_merged_sql_metrics_py",
     srcs = [
-        "tools/gen_merged_sql_metrics.py"
-    ]
-    main = "tools/gen_merged_sql_metrics.py"
+        "tools/gen_merged_sql_metrics.py",
+    ],
+    main = "tools/gen_merged_sql_metrics.py",
 )