fromupstream: wrap test description only if it is newly provided

Only wrap test description if it is newly provided via -t command line.
If the test description is from previous commit mesesage, for example
when using --replace, assume the test descriptions are already good.

BUG=none
TEST=fromupstream.py -b none -t "VERY_LONG_STRING..." \
     linux://238c30468f46b

Change-Id: I083826391da2a5e744cdb51482c65a666d24e616
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2345647
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Commit-Queue: Tzung-Bi Shih <tzungbi@chromium.org>
Tested-by: Tzung-Bi Shih <tzungbi@chromium.org>
1 file changed