Re-sort modules in rebar.app

ebin/rebar.app

@@ -30,12 +30,12 @@
               rebar_rel_utils,
               rebar_reltool,
               rebar_require_vsn,
+              rebar_shell,
               rebar_subdirs,
               rebar_templater,
               rebar_upgrade,
               rebar_utils,
               rebar_xref,
-              rebar_shell,
               getopt,
               mustache ]},
   {registered, []},