setup.py: fix installation issue when bdist_wheel command is not available
setup.py: fix installation issue when bdist_wheel command is not available

Fixes https://github.com/googlei18n/cu2qu/issues/157

https://gitlab.gnome.org/GNOME/cantarell-fonts/-/jobs/126444

googlefonts/fonttools,googlefonts/cu2qu,fonttools/fonttools,googlei18n/cu2qu