Bug 1103074: Add taskcluster phone build configuration.
Bug 1103074: Add taskcluster phone build configuration.

lissyx/build-mozharness,mrrrgn/build-mozharness,mozilla/build-mozharness,lissyx/build-mozharness,armenzg/build-mozharness,mozilla/build-mozharness,armenzg/build-mozharness,simar7/build-mozharness,mrrrgn/build-mozharness,walac/build-mozharness,simar7/build-mozharness,walac/build-mozharness