Added the new SURF example to the CMakeLists.txt file.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403059

examples/CMakeLists.txt

@@ -60,6 +60,7 @@ add_example(sockets_ex)
 add_example(sockets_ex_2)
 add_example(sockstreambuf_ex)
 add_example(std_allocator_ex)
+add_example(surf_ex)
 add_example(svm_ex)
 add_example(svm_pegasos_ex)
 add_example(svm_sparse_ex)