offload: Display the normalized load in 'guix offload status' output.

Fixes a regression introduced in
bbe66a53 whereby the actual
load (non-normalized) would be displayed.

* guix/scripts/offload.scm (check-machine-status): Add call to
'normalized-load'.

guix/scripts/offload.scm

@@ -733,7 +733,7 @@ (define (build-machine=? m1 m2)
                           (utsname:sysname uts) (utsname:release uts)
                           (utsname:machine uts)
                           (utsname:nodename uts)
-                          load
+                          (normalized-load machine load)
                           (/ free (expt 2 20) 1.))))
               machines)))