Trying travis fix from the [interwebs](travis-ci/travis-ci#5036)

inlined · inlined · commit 67a8e12a1c9b · 2016-05-10T12:28:22.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,6 +7,7 @@ sudo: false
 
 android:
   components:
+    - tools
     - build-tools-23.0.3
     - android-22
     - doc-23
