debian: Use Debian versions of dependencies

debian/cargo/config

@@ -0,0 +1,12 @@
+# When modifying this file, consider instead
+# to take advantage of the method that Cargo packagers use
+# to set up all the necessary stuff automatically:
+# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=907629#30
+
+[source.crates-io]
+registry = 'https://github.com/rust-lang/crates.io-index'
+replace-with = 'vendored-sources'
+
+[source.vendored-sources]
+directory = '/usr/share/cargo/registry'
+

debian/control

@@ -11,6 +11,11 @@ Build-Depends:
  libglib2.0-dev,
  libgtk-3-dev,
  libcroco3-dev,
+ librust-bitflags-1-dev (>= 1.0),
+ librust-maplit-1-dev (>= 1.0),
+ librust-serde-derive-1-dev (>= 1.0),
+ librust-serde-yaml-0.8-dev (>= 0.8),
+ librust-xkbcommon-0.4+wayland-dev (>= 0.4),
  libwayland-dev (>= 1.16),
  rustc,
  wayland-protocols (>= 1.14),