Remote Access: don't use bashism.
Remote Access: don't use bashism.

source isn't part of sh. . is.

BUG=None
TEST=cros deploy on gizmo.

Change-Id: I47f20e34ffd5680739004f4cda924350b5f526c5
Reviewed-on: https://chromium-review.googlesource.com/188451
Reviewed-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Commit-Queue: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Tested-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

chadversary/chromiumos.chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite