package/libdvdnav: bump version to 6.0.1

package/libdvdnav: bump version to 6.0.1

Changelog:
https://code.videolan.org/videolan/libdvdnav/blob/master/ChangeLog

Removed patch after upstream added a different detection code for OS/2:
https://code.videolan.org/videolan/libdvdnav/commit/ed3d4c31e16d976b8b95822570d7ea1f921e26ac

Build-tested using
support/config-fragments/autobuild/br-nios2-glibc.config

Added all hashes provided by upstream.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>