Tighten config.hpp and Jamfile logic before attaching static build problems.

[SVN r77997]

test/Jamfile.v2

@@ -16,6 +16,7 @@ project
    lib throw_test
      : throw_test.cpp
      : <link>shared:<define>BOOST_SYSTEM_DYN_LINK=1
+       <link>static:<define>BOOST_SYSTEM_STATIC_LINK=1
      ;