Include MAVEN_LOCAL

It's not used now, but it makes it easier to test local builds
without dirtying the workspace more than necessary.

Change-Id: I740baa8269ad903e39096e062cf40729a596d024
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 47a53eb..bf8faa6 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -1,4 +1,4 @@
-load("//tools/bzl:maven_jar.bzl", "maven_jar", "GERRIT", "MAVEN_CENTRAL")
+load("//tools/bzl:maven_jar.bzl", "maven_jar", "GERRIT", "MAVEN_CENTRAL", "MAVEN_LOCAL")
 
 COMMONMARK_VERSION = '0.9.0'
 
diff --git a/tools/bzl/maven_jar.bzl b/tools/bzl/maven_jar.bzl
index acfda5f..71f45ec 100644
--- a/tools/bzl/maven_jar.bzl
+++ b/tools/bzl/maven_jar.bzl
@@ -1 +1 @@
-load("@com_googlesource_gerrit_bazlets//tools:maven_jar.bzl", "maven_jar", "GERRIT", "MAVEN_CENTRAL")
+load("@com_googlesource_gerrit_bazlets//tools:maven_jar.bzl", "maven_jar", "GERRIT", "MAVEN_CENTRAL", "MAVEN_LOCAL")