Sort rebar_* modules in rebar.app

ebin/rebar.app

@@ -6,27 +6,27 @@
   {vsn, "2.0.0"},
   {modules, [ rebar,
               rebar_abnfc_compiler,
-              rebar_appups,
               rebar_app_utils,
+              rebar_appups,
+              rebar_asn1_compiler,
               rebar_base_compiler,
+              rebar_cleaner,
               rebar_config,
               rebar_core,
-              rebar_cleaner,
               rebar_ct,
               rebar_deps,
-              rebar_asn1_compiler,
               rebar_edoc,
               rebar_erlc_compiler,
+              rebar_erlydtl_compiler,
               rebar_escripter,
               rebar_eunit,
               rebar_file_utils,
               rebar_lfe_compiler,
-              rebar_erlydtl_compiler,
               rebar_log,
+              rebar_neotoma_compiler,
               rebar_otp_app,
               rebar_port_compiler,
               rebar_protobuffs_compiler,
-              rebar_neotoma_compiler,
               rebar_rel_utils,
               rebar_reltool,
               rebar_require_vsn,