* nongnu/packages/steam-client.scm: Use module guix records.
(<nonguix-container>): New record type.
(glibc-for-fhs-32, steam-libs-32, steam-libs-64): Removed.
(packages->ld.so.conf): Rename to fhs-ld.so.conf and use static paths.
(steam): Rename to steam-client, remove wrappers and inputs, and
replace with new definition for steam.
(fhs-min-libs): New alist.
(steam-client-libs): Add bash and coreutils, remove glibc and glibc-32.
(steam-gameruntime-libs): Add font-dejavu and font-liberation.
(fhs-union, nonguix-container->package, make-container-wrapper)
(make-container-manifest, make-container-internal)
(make-internal-script): New functions.
* nongnu/packages/steam-client.scm (steam)[propagated-inputs]: Remove.
[arguments]: Add former propagated-inputs to manifest.scm and fix
quoting in store-item->manifest-entry output.