tests: Adjust tests for new bootstrap Guile.

This is a followup to commit 5d6792f ("gnu: bootstrap: Create a wrapper for
guile to set the system load path.")

* tests/size.scm ("store-profile"): Expect profile of 'bash' bootstrap binary.
* tests/gexp.scm ("gexp->derivation #:references-graphs"): Expect GUILE-DRV to
  depend on 'bash' bootstrap binary.

tests/gexp.scm

@@ -536,6 +536,9 @@
                                           (guix build utils))))
        (ok? (built-derivations (list drv)))
        (guile-drv  (package->derivation %bootstrap-guile))
+       (bash       (interned-file (search-bootstrap-binary "bash"
+                                                           (%current-system))
+                                  "bash" #:recursive? #t))
        (g-one   -> (derivation->output-path drv "one"))
        (g-two   -> (derivation->output-path drv "two"))
        (g-guile -> (derivation->output-path drv)))
@@ -543,8 +546,10 @@
                  (equal? (call-with-input-file g-one read) (list one))
                  (equal? (call-with-input-file g-two read)
                          (list one (derivation->output-path two "chbouib")))
+
+                 ;; Note: %BOOTSTRAP-GUILE depends on the bootstrap Bash.
                  (equal? (call-with-input-file g-guile read)
-                         (list (derivation->output-path guile-drv)))))))
+                         (list (derivation->output-path guile-drv) bash))))))
 
 (test-assertm "gexp->derivation #:allowed-references"
   (mlet %store-monad ((drv (gexp->derivation "allowed-refs"