Make sure free function calls are added to the database

First implementation has some issues, but works for the basic cases.

There's a known issue that free function "qualifiedName" is the function name, but this is being used as unique name for memory searches. We need to overhaul the unique id handling for free functions, at least. One suggestion is to append the component's qualifiedName to the function name to create a bit more unique "qualified name" for the free functions, but that's not really a "qualifiedName", it is just a way to use the name as unique for memory searches. - This will not be tackled in this MR.