Bug fix: correct path to mod files

This did not produce an error because the mod files are also in
`${CMAKE_CURRENT_BINARY_DIR}`.

Inst_eddies/Tests/CMakeLists.txt

@@ -113,6 +113,6 @@ foreach(my_target IN ITEMS test_get_1_outerm test_set_all_outerm
     ${CMAKE_CURRENT_BINARY_DIR}/${my_target}_modules)
 
   target_include_directories(${my_target} PRIVATE
-    ${PROJECT_BINARY_DIR}/${my_target}_modules>)
+    ${CMAKE_CURRENT_BINARY_DIR}/${my_target}_modules>)
 
 endforeach()