package/libsamplerate: bump to version 0.2.2

- Switch site to get latest release
- Update indentation in hash file (two spaces)

https://github.com/libsndfile/libsamplerate/blob/0.2.2/NEWS



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