Add fontbakery-check-bbox.py
Add fontbakery-check-bbox.py

FontForge script for finding the bbox

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