distro: acl: Patch references to /bin/sh.

* distro/packages/acl.scm (acl): Add `patch-makefile-SHELL' phase.

distro/packages/acl.scm

@@ -41,15 +41,19 @@
     (build-system gnu-build-system)
     (arguments
      `(#:phases
-       (alist-replace 'check
+       (alist-cons-after
+        'configure 'patch-makefile-SHELL
+        (lambda _
+          (patch-makefile-SHELL "include/buildmacros"))
+        (alist-replace
+         'check
          (lambda _
-                        (patch-shebang "test/run")
            (system* "make" "tests" "-C" "test")
 
            ;; XXX: Ignore the test result since this is
            ;; dependent on the underlying file system.
            #t)
-                      %standard-phases)))
+         %standard-phases))))
     (inputs `(("attr" ,attr)
               ("gettext" ,guix:gettext)
               ("perl" ,perl)))