drone.yml new gomobile image

.drone.yml

@@ -57,6 +57,7 @@ steps:
       branch: trunk
       event: [ push, pull_request ]
     commands:
+      - gomobile init
       - make android
   - name: notify-email
     image: drillster/drone-email
@@ -80,5 +81,6 @@ steps:
     gogs_url: https://git.openprivacy.ca
 
 volumes:
+  # gopath where bin and pkg lives to persist across steps
   - name: deps
     temp: {}