build: fix comma in build files

Change-Id: I7e1676c5dadc22a8bac63706b196625e152549ef

BUILD.extras

diff --git a/BUILD.extras b/BUILD.extras
index c272dc3..d92af48 100644
--- a/BUILD.extras
+++ b/BUILD.extras
@@ -15,7 +15,7 @@
 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",
 )