Adapt to new location of config_autogen.h

[milsen]

In loader.py, we include config_autogen.h as follows:

ogdf-python/src/ogdf_python/loader.py

Line 55 in f487b2c

cppyy.include("ogdf/basic/internal/config_autogen.h")

and use the include directories defined as follows:

ogdf-python/src/ogdf_python/loader.py

Lines 32 to 46 in f487b2c

	if "OGDF_INSTALL_DIR" in os.environ:
	INSTALL_DIR = os.path.expanduser(os.getenv("OGDF_INSTALL_DIR"))
	cppyy.add_include_path(os.path.join(INSTALL_DIR, "include"))
	cppyy.add_library_path(os.path.join(INSTALL_DIR, "lib")) # TODO windows?
	if "OGDF_BUILD_DIR" in os.environ:
	BUILD_DIR = os.path.expanduser(os.getenv("OGDF_BUILD_DIR"))
	cppyy.add_include_path(os.path.join(BUILD_DIR, "include"))
	cppyy.add_include_path(os.path.join(BUILD_DIR, "..", "include")) # TODO not canonical
	cppyy.add_library_path(BUILD_DIR)
	try:
	wheel_inst_dir = importlib_resources.files("ogdf_wheel") / "install"
	if wheel_inst_dir.is_dir():
	cppyy.add_library_path(str(wheel_inst_dir / "lib"))
	cppyy.add_library_path(str(wheel_inst_dir / "bin"))
	cppyy.add_include_path(str(wheel_inst_dir / "include"))

However, because of ogdf/ogdf#253, config_autogen.h now is not anymore in ...include/ogdf/basic/ (like the other header files) but in ...include/ogdf-release/ogdf/basic/ or ...include/ogdf-debug/ogdf/basic/. So we need an additional include directory. Otherwise using ogdf-python with the newest ogdf fails.