When we read the 'uevent' file we need to make sure, that we do not
read the relative DEVNAME= path provided by the kernel and overwrite
the absolute path udev expects here.
- Include exported package information
- Include C include information
- g_udev_device_get_parent & g_udev_device_get_parent_with_subsystem
transfer ownership of their return values
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>