Fix jar name in library bundle when library project specifies a version.

Change-Id: I99883994fcf22642a843a84e0f6e6860009d8543
diff --git a/gradle/src/main/groovy/com/android/build/gradle/AndroidLibraryPlugin.groovy b/gradle/src/main/groovy/com/android/build/gradle/AndroidLibraryPlugin.groovy
index 19f973c..bd56b12 100644
--- a/gradle/src/main/groovy/com/android/build/gradle/AndroidLibraryPlugin.groovy
+++ b/gradle/src/main/groovy/com/android/build/gradle/AndroidLibraryPlugin.groovy
@@ -102,7 +102,7 @@
         Jar jar = project.tasks.add("${buildTypeData.buildType.name}Jar", Jar);
         jar.from(variant.compileTask.outputs);
         jar.destinationDir = project.file("$project.buildDir/$DIR_BUNDLES/${variant.dirName}")
-        jar.baseName = "classes"
+        jar.archiveName = "classes.jar"
         String packageName = variantConfig.getPackageFromManifest().replace('.', '/');
         jar.exclude(packageName + "/R.class")
         jar.exclude(packageName + "/R\$*.class")