[yocto] Is LICENSE in a recipe of groff correct

[Matsumoto, Hiroo]

Hi


A recipe of groff, which is meta/recipes-extended/groff/groff_1.20.1.bb,
shows that license of groff is GPLv2, but COPYING file in groff-1.20.1
shows that license of groff is GPLv3.

I think that license is GPLv2 until groff-1.19.2 and is GPLv3 from groff-1.20.1.


Regards.

Hiroo MATSUMOTO