Add hash examples to the unit tests.

[SVN r30612]

test/Jamfile

@@ -48,3 +48,5 @@ rule hash-test-output ( name )
             [ run link_test.cpp link_test_2.cpp : : : <include>$(BOOST_ROOT) ]
         ;
 }
+
+subinclude libs/functional/hash/examples ;

test/Jamfile.v2

@@ -26,3 +26,5 @@ test-suite functional/hash
         [ run hash_map_test.cpp framework ]
         [ run link_test.cpp link_test_2.cpp ]
     ;
+
+build-project ../examples ;