Sadly the original repository (stenzek/duckstation) is missing the
necessary files to build a libretro core, so we need to use the fork
instead.

(cherry picked from commit 9947198)

This will allow users to package their own core derivations if they want
without necessary submitting to nixpkgs.

(cherry picked from commit 702c8f2)

…11-16

(cherry picked from commit 17c37fe)

This core never worked as intended:
libretro/libretro-core-info#8.

(cherry picked from commit 716deb5)

(cherry picked from commit 0d9f845)

(cherry picked from commit 18bc6a9)

The original repository was abandoned.

(cherry picked from commit d03b66c)

(cherry picked from commit d204860)

(cherry picked from commit 2fe3827)

(cherry picked from commit 9aee041)

(cherry picked from commit 82b4887)

(cherry picked from commit 0e8e7c8)