buildFHSEnvBubblewrap: preserve pname, version

It's useful to have access to these attributes from packages built with
buildFHSEnvBubblewrap, and it reduces the difference between FHS and
non-FHS packages.

'name' is already handled by runCommandLocal.

pkgs/build-support/build-fhsenv-bubblewrap/default.nix

···
 
   bin = writeShellScript "${name}-bwrap" (bwrapCmd { initArgs = ''"$@"''; });
 in runCommandLocal name {
+  inherit pname version;
   inherit meta;
 
   passthru = passthru // {