Instroduce order-sensitive properties.

* build/feature.jam: New feature attribute 'order-sensitive'.

* jam_src/modules/property-set.c: (property_set_create): Don't sort
  order-sensitive attributes.


[SVN r22132]

tools/build

@@ -1 +1 @@
-Subproject commit 841a1fd4eac176893a6511355da91969c5058b4f
+Subproject commit 03a73e9a08d9d25cba8dd5e9a3e673abf079cc01