com.google.fonts/check/037: Simplify Ms Font Val subprocess call.
com.google.fonts/check/037: Simplify Ms Font Val subprocess call.

In Windows, a .exe can be run without specifying the .exe extension.
Therefore all three platforms can run FontValidator using the same
call.

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