Add c/h files as dependencies.

[jcarrano]

Tell sphinx that the output depends on the C/h files where the entities are defined.

This needs #5 to be useful.

Alternatively, depend on the XML files (but that would need an external method to check if the content changed, because Doxygen will always touch the files).

[jcarrano]

Tell sphinx that the output depends on the C/h files where the entities are defined.

Won't work because something on another unrelated file could change the output.

Alternatively, depend on the XML files (but that would need an external method to check if the content changed, because Doxygen will always touch the files).

Also won't work.

What could work is constructing a some sort of query, though that may break if the user does weird things in antidox-include-children