som_alerts_dispatcher: Fix logs when unable to find build.

The previous fix was rushed and logged the wrong thing.

BUG=chromium:804372
TEST=som_alerts_dispatcher

Change-Id: I2557ff3f4c75c188c4bde09fa27e1e837be4255f
Reviewed-on: https://chromium-review.googlesource.com/879221
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: David Riley <davidriley@chromium.org>
Reviewed-by: Jacob Kopczynski <jkop@chromium.org>
1 file changed