package/bird: bump to version 2.0.8

- Drop patches (already in version)
- Update indentation in hash file (two spaces)

https://gitlab.nic.cz/labs/bird/-/blob/v2.0.8/NEWS



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>