Bug 1137820 part 1: Update phone build image.

Inherits from builder image version 0.5.0.

--HG--
extra : rebase_source : efe5016c8fb24c6e3ec083999c20e9bc5ebf769b

testing/docker/phone-builder/Dockerfile

@@ -1,4 +1,4 @@
-FROM          quay.io/mozilla/builder:0.2.6
+FROM          quay.io/mozilla/builder:0.5.0
 MAINTAINER    Wander Lairson Costa <wcosta@mozilla.com>
 
 # Add utilities and configuration

testing/docker/phone-builder/VERSION

@@ -1 +1 @@
-0.0.8
+0.0.9