[Debian-on-mobile-maintainers] Bug#1064373: squeekboard: Depends on obsolete rust-gtk

[Arnaud Ferraris]

Control: severity 1064373 important
Control: unblock 1070086 by 1064373
Control: tags 1064373 - ftbfs

Hi,

rust-gtk has been re-introduced as versioned crates along with all its 
dependencies, being maintained by the DebianOnMobile team. As a 
consequence, this is no longer blocking the removal of the old rust-gtk-sys.

While squeekboard should still move to GTK4, this makes it less urgent 
to fix, and so I'm downgrading the severity of the corresponding bug.

Regards,
Arnaud