[added] progress reporter back to CI

Summary: It's really frustrating when CI fails and you have no idea why.

Reviewers: O2 Material Motion, O3 Material JavaScript platform reviewers, #material_motion, featherless

Reviewed By: O2 Material Motion, #material_motion, featherless

Tags: #material_motion

Differential Revision: http://codereview.cc/D3090

karma.conf.js

@@ -14,7 +14,7 @@ module.exports = function(config) {
     // CircleCI needs JUnit to show tests correctly.
     // https://circleci.com/docs/1.0/test-metadata/#karma
     reporters: process.env.CI
-      ? ['junit']
+      ? ['junit', 'progress']
       : ['progress'],
     junitReporter: {
       outputDir: process.env.CIRCLE_TEST_REPORTS,