Update .travis.yml

vivekkiran · vivekkiran · commit e2ad3642cb75 · 2015-05-24T14:27:55.000+05:30
diff --git a/.travis.yml b/.travis.yml
@@ -3,3 +3,4 @@ android:
   components:
     - build-tools-22.0.1
     - android-22
+    - extra
