Implement a somewhat better link-compatibility check.

* new/targets.jam
  (basic-target.check-for-link-compatibility): New rule.
  (basic-target.generate-sources, basic-target.generate): Call the above.


[SVN r20191]

tools/build

@@ -1 +1 @@
-Subproject commit 2ee0f0be563676205302802466093dfe0d77b85e
+Subproject commit 16abe38d496fadd8b9a2cbeda0ee181e7f796172