com.google.fonts/check/042 Add rationale 
com.google.fonts/check/042 Add rationale 

Fixes https://github.com/googlefonts/fontbakery/issues/2157
googlefonts/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,graphicore/fontbakery,graphicore/fontbakery,moyogo/fontbakery,graphicore/fontbakery,googlefonts/fontbakery