Updated Travis config to work with more recent build tools

Mustafa Ali · Mustafa Ali · commit 77adde27e637 · 2016-01-30T12:21:32.000+05:30
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,7 @@
 language: android
 android:
   components:
+    - tools
     - build-tools-23.0.2
     - android-23
 script:
