misc/libcdio: Update to 2.1.0

Note that upstream no longer builds cdda-player on NetBSD or OpenBSD.

version 2.1.0
=============
2019-04-17 Holy Wednesday

Most (all?) of the improvements and bug fixes are thanks to Thomas Schmitt and Edd Barrett. This release introduces an OpenBSD driver, courtesy of Edd Barrett, based on the NetBSD driver.

- NetBSD driver fixes. Switch from MSF addressing to LBA addressing in driver. (Edd Barrett and Jasper Lievisse Adriaanse)
- Fix handling in drivers,libcdio-paranoia and `cd-info` when starting track number is greater than 1. (Edd Barrett and Thomas Schmitt)
- More tolerant of non-compliant ISOs such as openSUSE Leap 15.0.
- `cdda-player` fixes, such as adding a missing `-d` in cdda-player help (Thomas Schmitt and Edd Barrett)
- `cdtext_list_languages_v2()` to be preferred over now deprecated `cdtext_list_languages()`. New API call `cdtext_set_language_index()`. (Thomas Schmitt)
- Add `read-disc-struct` example program to show how to use a MMC `DVD_READ_DISC_STRUCTURE`. (Thomas Schmitt)
- Various errors in driver reading turned into warnings. (Edd Barrett and Thomas Schmitt)
- Some code cleanups and documentation improvements.
- Bugs:
* [Bug 53170: I/O leak when we can't read ISO file ](https://savannah.gnu.org/bugs/index.php?53170)
* [Bug 53928: Cdtext not displayed in case of `CDTEXT_LANGUAGE_UNKNOWN`](https://savannah.gnu.org/bugs/index.php?3929)
* [Bug 53929: cd-text with invalid characters failing to convert to utf8](https://savannah.gnu.org/bugs/index.php?3928)

(gdt)