graphite: Don't realm branch in graphite role

The deployment-prep specific graphite host is no more, and
so it is ok to remove this.

Also ensures $hostname is set, which wasn't the case before.

Change-Id: Iec143706b526d867453f72aafbfcd78bdbdbbd9f
androidsdk: Specify required libraries for trusty as well

The sdl package was removed since it was required only for running
the emulator, which we did not need.

Change-Id: I76c5b3dff7905d94adb4d46929f09250dff26bd7
Merge "graphite: Don't realm branch in graphite role" into production
Merge "androidsdk: Specify required libraries for trusty as well" into production