emulators/yuzu: silence makepatch warning

$ portlint
[...]
WARN: /usr/ports/yuzu/files/patch-renderdoc: patch was not generated using `make makepatch''. It is recommended to use `make makepatch'' when you need to [re-]generate a patch to ensure proper patch format.

(cherry picked from commit 3af26eeeb335e796f7563d386a498207f81145b9)