chromeos-config: Correct unit test for firmware

This was broken by a recent CL which changed the error string. Fix it.

BUG=chromium:774498
TEST=FEATURES=test sudo -E emerge chromeos-config-host

Change-Id: I4764dfb120fd7efaa228fa6112e7667bd9d718f6
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/900126
Reviewed-by: Jason Clinton <jclinton@chromium.org>
Reviewed-by: C Shapiro <shapiroc@google.com>
(cherry picked from commit 052a0dce3a19a62fd95d3c7ff4f3bb6ca64d514f)
Reviewed-on: https://chromium-review.googlesource.com/902888
Reviewed-by: YH Lin <yueherngl@chromium.org>
Commit-Queue: Patrick Berny <pberny@chromium.org>
Tested-by: Patrick Berny <pberny@chromium.org>
Trybot-Ready: Patrick Berny <pberny@chromium.org>
1 file changed