x11-fm/filerunner: Update 23.03.07.16 => 24.07.12.20, improve port

Changelog:
https://sourceforge.net/projects/filerunner/files/release-24.07.12.20/changelog-24.07.12.20.txt/download

Improve port:

• Replace PORTVERSION with DISTVERSION.
• Use shebangfix instead of manual REINPLACE_CMD.
• Reimplement do-install.

PR: 290612
Co-authored-by: Aldis Berjoza <aldis@berjoza.lv>