* gnu/packages/emulators.scm: Change references from 'vulkan-icd-loader' to
'vulkan-loader'.
* gnu/packages/games.scm: Change references from 'vulkan-icd-loader' to
'vulkan-loader'.
* gnu/packages/video.scm: Change references from 'vulkan-icd-loader' to
'vulkan-loader'.
* gnu/packages/vulkan.scm (vulkan-loader): Rename from 'vulkan-icd-loader' to
'vulkan-loader'. Update URL and hash.
* gnu/packages/wine.scm: Change references from 'vulkan-icd-loader' to
'vulkan-loader'.
* gnu/packages/emulators.scm (dolphin-emu): Update to commit
47fd8c6eff4cdea7660d0fa78040f98d1d4fa136.
[arguments]: Add 'fixgcc7 phase.
[native-inputs]: Add gcc@7 since building with gcc@5 doesn't work anymore.
* gnu/packages/patches/mupen64plus-video-z64-glew-correct-path.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/emulators.scm (mupen64plus-video-z64)[source]: Use it.