Bug#953189: src:libgphoto2: fails to migrate to testing for too long

[wferi]

Hi,

I'd like to upload the new versions of gphoto2 and libgphoto2 to fix
this migration bug (and to make use of them in qstopmotion).  If you
agree, please accept my membership request on Salsa and I'll go ahead.
-- 
Thanks,
Feri