update_depot_tools: Use git checkout -q origin/master

Bug: 996359
Change-Id: I7c87fd824103c91c1dd5b9b8975354732e5eb0a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1765839
Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

update_depot_tools

@@ -101,7 +101,7 @@ function update_git_repo {
 
   git fetch -q origin &> /dev/null
   local REBASE_TXT STATUS
-  CHECKOUT_TXT=$(git checkout origin/master 2>&1)
+  CHECKOUT_TXT=$(git checkout -q origin/master 2>&1)
   STATUS=$?
   if [[ $STATUS -ne 0 ]]; then
     echo "depot_tools update failed. Conflict in $base_dir" >&2

update_depot_tools.bat

@@ -51,7 +51,7 @@ for /F %%x in ('git config --get remote.origin.url') DO (
   )
 )
 call git fetch -q origin > NUL
-call git checkout origin/master > NUL
+call git checkout -q origin/master > NUL
 if errorlevel 1 (
   echo Failed to update depot_tools.
   goto :EOF