- If present, include the directories where API header files
are generated into.
- Improve extraction of include paths from CPP
- Generalize the file/directory exclusion
This reduces some of the "warning" chatter from Doxygen.
Change-Id: I7ac02bff1639fe63f11263176020b0f040255017
Signed-off-by: Chris Luke <chrisy@flirble.org>