podiki authored Feb 27, 2022 and Jelle Licht committed Mar 13, 2022

* nongnu/packages/steam-client.scm (steam-gameruntime-libs): Add mangohud and
needed dependencies (imgui and spdlog).
(make-container-wrapper): Expose /sys/class/drm, /sys/class/hwmon, and
/sys/class/powercap (if it exists) for hardware monitoring.
Add /usr/share/vulkan/implicit_layer.d, and link MangoHud.json files here,
renaming the 32bit version to avoid a collision.
Follow links in /share/vulkan/icd.d.

Signed-off-by: Jelle Licht <jlicht@fsfe.org>