Add missing bazel lint target

... and fix the existing issue

Change-Id: Id60b008fbfeb71543f0422b3a1a095968adbecd4
(cherry picked from commit e22d576be5a52c593b1a8f2779fcca43104b8928)

Makefile

@@ -230,7 +230,10 @@ what-gerrit-makes:
 	$(MAKE)	-C tests what-gerrit-makes
 
 format-bazel:
-	scripts/run-buildifier --lint=fix --mode=fix
+	scripts/run-buildifier --mode=fix
+
+lint-bazel:
+	scripts/run-buildifier --lint=fix
 
 documentation:
 	echo Nothing to do here remove this target