More V2 Jamfile tweaks.

[SVN r23764]

test/link/Jamfile.v2

@@ -2,6 +2,9 @@
 
 lib link_test : link_test.cpp 
     : <link>shared <link-runtime>shared 
+      # This is needed to make the test work, I'm unsure if this
+      # should be set globally.
+      <define>BOOST_DYN_LINK=1
     : 
         debug release
     ;