device_added: restore backgrounding of inputcontrol

The dropping of the & was an accident, so restore it to fix boot speed.

BUG=chromium:374873
TEST=None

Change-Id: I19727fec2cf7cf14a1a279d0a8194c06f77aa544
Reviewed-on: https://chromium-review.googlesource.com/200480
Reviewed-by: Michael Spang <spang@chromium.org>
Commit-Queue: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
1 file changed