exfat: debian: install a Kbuild file, improve installation

No more tempdir that might linger around becaue dh_clean
does not know about it.
Removes the dependency on uuid aswell, can build package
on a sbuild slave now.

Signed-off-by: Norbert Lange <nolange79@gmail.com>
Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>