make check 028 "Check font has a license" emit warning
make check 028 "Check font has a license" emit warning

instead of errors when more than a single license file is found.

(issue #1379)

graphicore/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,graphicore/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,moyogo/fontbakery