Add maven repository metadata jar to third_party

See https://github.com/google/bazel/issues/88.

--
MOS_MIGRATED_REVID=90089965
diff --git a/src/main/java/com/google/devtools/build/lib/bazel/repository/HttpDownloadFunction.java b/src/main/java/com/google/devtools/build/lib/bazel/repository/HttpDownloadFunction.java
index c16f509..9348d66 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/repository/HttpDownloadFunction.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/repository/HttpDownloadFunction.java
@@ -54,7 +54,6 @@
     FileValue repositoryValue = RepositoryFunction.getRepositoryDirectory(
         descriptor.outputDirectory, env);
     if (repositoryValue == null) {
-      System.out.println("Returning null");
       return null;
     }
 
diff --git a/third_party/BUILD b/third_party/BUILD
index 0ae8c46..861a3ee 100644
--- a/third_party/BUILD
+++ b/third_party/BUILD
@@ -84,6 +84,7 @@
         "maven_model/maven-aether-provider-3.2.3.jar",
         "maven_model/maven-model-3.2.3.jar",
         "maven_model/maven-model-builder-3.2.3.jar",
+        "maven_model/maven-repository-metadata-3.2.3.jar",
     ],
 )