Bug#1094772: gtk-layer-shell: Bump minimum gtk3

[Jeremy Bícha <jeremy.bicha@canonical.com>]

Source: gtk-layer-shell
Version: 0.9.0-1
Severity: important
X-Debbugs-CC: werdahias@debian.org

gtk-layer-shell 0.9.0-1 is migrating to Testing now.

As follow up from https://bugs.debian.org/1094442 I am guessing that
gtk-layer-shell 0.9 doesn't work with gtk3 << 3.24.48. Therefore, I
suggest adjusting the Build-Depends to
 libgtk-3-dev (>= 3.24.48)

which will also update the binary Depends to match.

Also I think you want to add these Depends to libgtk-layer-shell-dev
to match its pkgconfig file:
 libgtk-3-dev (>= 3.24.48),
 libwayland-client

Thank you,
Jeremy Bícha