Work-in-progress on better library handling.

* new/builtin.jam
  (link-action.adjust-properties): Remove.
  (linking-generator.generated-targets): Do what adjust-properties used to do.
  (linking-generator.run): Convert <library> properties to sources.
  (exe-generator): New class.


[SVN r20455]

tools/build

@@ -1 +1 @@
-Subproject commit 0ce601c7c4b607fadb329d7bc57d619e74aa2713
+Subproject commit e06fd02fd37b68ab97476214222d302ae308cd86