feat: gnucobol
Please add a GnuCOBOL package. Note: there was an old unmerged MR to do so: !21076 (closed) where I've just posted some comments - in general this APKBUILD looks quite well to me.
The file may could copy some of https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-gnucobol/PKGBUILD (like downloading from official NIST source).