Rename license problem tag to license-problem prefix

In order to be consistant rename
 * font-adobe-copyrighted-fragment to
   license-problem-font-adobe-copyrighted-fragment
 * font-adobe-copyrighted-fragment-no-credit to
   license-problem-font-adobe-copyrighted-fragment-no-credit

Signed-off-by: Niels Thykier <niels@thykier.net>