previously we would return "*" as one of the suggested owners when
a CL included a file that anyone could approve. If the change had
other owners, the "*" was unnecessary, and if the change only included
wildcard-owned files, "*" isn't very helpful, so I've changed the text slightly.

R=maruel@chromium.org
BUG=169168


Review URL: https://chromiumcodereview.appspot.com/11867016

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@177575 0039d316-1c4b-4281-b951-d872f2087c98