chrootenv: add setuid wrappers to path

pkgs/build-support/build-fhs-chrootenv/env.nix

···
     export PS1='${name}-chrootenv:\u@\h:\w\$ '
     export LOCALE_ARCHIVE='/usr/lib/locale/locale-archive'
     export LD_LIBRARY_PATH='/run/opengl-driver/lib:/run/opengl-driver-32/lib:/usr/lib:/usr/lib32'
-    export PATH='/usr/bin:/usr/sbin'
+    export PATH='/var/setuid-wrappers:/usr/bin:/usr/sbin'
     ${profile}
   '';