* gnu/packages/game-development.scm (godot): Update to 4.6.
[source]: Remove libjpeg-turbo patch and add glslang patch. Update snippet to
preserve dr_libs and re-spirv and remove glslang.
[arguments]<#:scons-flags>: Disable builtin glslang.
<#:phases>: Add unpack-mesa and use-system-spirv phases. Add file from mesa
to unbundle-wayland phase.
[inputs]: Add spirv-headers and change zstd to zstd-1.5.7.
* gnu/packages/patches/godot-glslang.patch: New file.
* gnu/local.mk (dist_patch_DATA): Update to current patch for godot.
Change-Id: I9b0daf4d25d317f2de3333a9adeaafbf548e0e2f
