Bug 775308 - Enable GPU acceleration in the emulator used by Marionette, r=jgriffin, DONTBUILD because NPOTB

testing/marionette/client/marionette/emulator.py

@@ -133,6 +133,7 @@ class Emulator(object):
                          '-partition-size', '512',
                          '-verbose',
                          '-skin', self.res,
+                         '-gpu', 'on',
                          '-qemu'] + self.tail_args)
         return qemuArgs