Refactoring.

* new/targets.jam
   (basic-target.final-properties): New rule, extracted from 'generate'.
   (basic-target.generate-sources): New rule, extracted from 'generate'.
   (basic-target.requirements): Gone.


[SVN r17684]

tools/build

@@ -1 +1 @@
-Subproject commit 5aeb1de1919e252f48b3e3999c5b2a52b5d04164
+Subproject commit 4e531ecc652677cb1f34a4de8da5d787c98185fe