Update travis.yml to reflect new build tools

Author: samtstern

.travis.yml

@@ -5,7 +5,7 @@ android:
   components:
     - platform-tools
     - tools
-    - build-tools-24.0.0
+    - build-tools-24.0.1
     - android-24
     - extra-google-google_play_services
     - extra-google-m2repository