libmtp6 -> libmtp7 transition

[Rafael Laboissiere]

Dear amarok, audacious-plugins, gnomad2, and rhythmbox maintainers,

Now that the libmtp5 -> libmtp6 transition is completed in testing, it is
time to start the libmtp6 -> libmtp7 transition.  I uploaded today
libmtp_0.2.4 to unstable, which has the new SOVERSION.  Please, build/test
your packages against this new version of libmtp.

Thanks,

-- 
Rafael