pull: Don't trigger 'hash guix' hint needlessly.

Previously if ~/.config/guix/current/bin was in $PATH, we'd still
suggest to run 'hash guix' because we'd compare (which "guix") against
/var/guix/profiles/per-user/….

* guix/scripts/pull.scm (build-and-install): Check whether (which
"guix") matches PROFILE or its user-friendly variant.

guix/scripts/pull.scm

@@ -197,11 +197,13 @@ true, display what would be built without actually building it."
         (match (which "guix")
           (#f (return #f))
           (str
-           (let ((command (string-append profile "/bin/guix")))
-             (unless (string=? command str)
+           (let ((new (map (cut string-append <> "/bin/guix")
+                           (list (user-friendly-profile profile)
+                                 profile))))
+             (unless (member str new)
                (display-hint (format #f (G_ "After setting @code{PATH}, run
 @command{hash guix} to make sure your shell refers to @file{~a}.")
-                                     command)))
+                                     (first new))))
              (return #f))))))))
 
 (define (honor-lets-encrypt-certificates! store)