As reported, see URL: app-admin/gkrellm/files/gkrellm-2.3.6_rc1-update_german_translation.patch.xz: application/x-xz; charset=binary (size=18184) Policy reference: https://devmanual.gentoo.org/general-concepts/tree/index.html#what-belongs-in-the-tree%3F
It appears this file has been removed. 06 Apr 2016; Justin Lecher <jlec@gentoo.org> -files/gkrellm-2.3.6_rc1-update_german_translation.patch.xz, gkrellm-2.3.6_rc1.ebuild, gkrellm-2.3.6_rc1-r1.ebuild: Mirror binary files and remove from VCS