GTTF: only print the message about skipping retries when it actually applies.

Before the launcher would print it also when the limit of retries has been
reached, which is different from doing less than requested number of retries
because so many tests are failing.

BUG=236893
R=sky@chromium.org

Review URL: https://codereview.chromium.org/102073012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243231 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243231