Bug 913281 - Mozharness should explicitly pass --use-device-libs to runtestsb2g.py, r=jgriffin
Bug 913281 - Mozharness should explicitly pass --use-device-libs to runtestsb2g.py, r=jgriffin

--HG--
branch : production

walac/build-mozharness,kartikgupta0909/gittest,lissyx/build-mozharness,simar7/build-mozharness,armenzg/build-mozharness,simar7/build-mozharness,escapewindow/mozharness,armenzg/build-mozharness,kartikgupta0909/gittest,lissyx/build-mozharness,mozilla/build-mozharness,kartikgupta0909/build-mozharness,kartikgupta0909/mozilla-mozharness,mozilla/build-mozharness,mrrrgn/build-mozharness,mrrrgn/build-mozharness,kartikgupta0909/mozilla-mozharness,escapewindow/mozharness,walac/build-mozharness,kartikgupta0909/build-mozharness