Format WORKSPACE with buildifier 0.12.0

Change-Id: I0954ae526663374f60c6118be8384c44a45d284a

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index c5737c9..1ce75d4 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -9,9 +9,9 @@
 
 load(
     "@com_googlesource_gerrit_bazlets//tools:maven_jar.bzl",
-    "maven_jar",
     "GERRIT",
     "MAVEN_CENTRAL",
+    "maven_jar",
 )
 
 maven_jar(