Add Boost.Test

[SVN r14767]

Jamfile

@@ -1,5 +1,8 @@
 project-root ;
-subinclude libs/regex/build ;
-subinclude libs/thread/build ;
+
+# please order by name to ease maintenance
 subinclude libs/python/build ;
+subinclude libs/regex/build ;
 subinclude libs/signals/build ;
+subinclude libs/test/build ;
+subinclude libs/thread/build ;