[heavyoil] add forgotten link to input files in cmake list

lecture/mm/heavyoil/sagd/CMakeLists.txt

+add_input_file_links()
+
 dune_add_test(NAME sagd
               SOURCES sagd.cc
               COMMAND ${CMAKE_CURRENT_BINARY_DIR}/sagd

lecture/mm/heavyoil/sagdcyclic/CMakeLists.txt

+add_input_file_links()
+
 dune_add_test(NAME sagd_cyclic
               SOURCES sagd_cyclic.cc
               COMMAND ${CMAKE_CURRENT_BINARY_DIR}/sagd_cyclic

lecture/mm/heavyoil/sagdcyclichyst/CMakeLists.txt

+add_input_file_links()
+
 dune_add_test(NAME sagd_cyclic_hyst
               SOURCES sagd_cyclic_hyst.cc
               COMMAND ${CMAKE_CURRENT_BINARY_DIR}/sagd_cyclic_hyst