[googlespec] Fix condition "description" if there is no file
[googlespec] Fix condition "description" if there is no file

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