* gnu/packages/emulators.scm (retroarch) [source]: Add snippet removing
most bundled sources. Apply patch to allow using system SPIRV-Cross.
[phases] <configure>: Add --disable-builtinspirv_cross. Disable non-core features making use of bundled
libraries (7zip, cheevos crtswitchres, discord, dr_mp3, ixbm, stb_font,
stb_image, stb_vorbis and xdelta).
[inputs]: Add spirv-cross.
[license]: Add licenses of bundled sources.
* gnu/packages/patches/retroarch-unbundle-spirv-cross.patch: New file.
Change-Id: I824391424bf0fa2ec3888f02535b94dea3021378
