reorder module system boot time

* ice-9/boot-9.scm: Postpone module system boot until (%app modules) is
  defined, so that resolve-module will work. This might not actually be
  necessary given the previous tomfoolery in resolve-module, but it
  doesn't seem like a bad change.

ice-9/boot-9.scm

@@ -1859,16 +1859,17 @@
 (define module-export! #f)
 (define default-duplicate-binding-procedures #f)
 
+(define %app (make-module 31))
+(define app %app) ;; for backwards compatability
+
+(local-define '(%app modules) (make-module 31))
+(local-define '(%app modules guile) the-root-module)
+
 ;; This boots the module system.  All bindings needed by modules.c
 ;; must have been defined by now.
 ;;
 (set-current-module the-root-module)
 
-(define %app (make-module 31))
-(define app %app) ;; for backwards compatability
-(local-define '(%app modules) (make-module 31))
-(local-define '(%app modules guile) the-root-module)
-
 ;; (define-special-value '(%app modules new-ws) (lambda () (make-scm-module)))
 
 (define (try-load-module name)