Typo when countdown is more than 1.

Change-Id: I1158b7317a8849e81bc990d556709c7d2de5c218
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3655450
Auto-Submit: Louis Romero <lpromero@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>

ninjalog_uploader_wrapper.py

@@ -64,7 +64,7 @@ The following information will be uploaded with ninjalog.
 * following build configs
 %s
 
-Uploading ninjalog will be started after you run autoninja another %d time.
+Uploading ninjalog will be started after you run autoninja another %d time(s).
 
 If you don't want to upload ninjalog, please run following command.
 $ python3 %s opt-out