Fix incorret Pre-CQ launcher URL
Fix incorret Pre-CQ launcher URL

BUG=chromium:346397
TEST=`bulidbot/run_tests`
TEST=Visually inspect pre-cq-launcher trybot output

Change-Id: Ia475a9efd5354595cefe82c8f762104947dd8968
Reviewed-on: https://chromium-review.googlesource.com/188409
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Tested-by: Yu-Ju Hong <52dc720c411f8e2156e608c1a8b894a917489667@chromium.org>
Commit-Queue: Yu-Ju Hong <52dc720c411f8e2156e608c1a8b894a917489667@chromium.org>

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