libinput: 1.5.1 -> 1.7.2

Changelogs:

1.5.2: https://lists.freedesktop.org/archives/wayland-devel/2016-November/031926.html
1.5.3: https://lists.freedesktop.org/archives/wayland-devel/2016-December/032110.html
1.5.5: https://lists.freedesktop.org/archives/wayland-devel/2017-January/032610.html
1.6.0: https://lists.freedesktop.org/archives/wayland-devel/2017-January/032746.html
1.6.1: https://lists.freedesktop.org/archives/wayland-devel/2017-February/032940.html
1.6.2: https://lists.freedesktop.org/archives/wayland-devel/2017-February/033169.html
1.6.3: https://lists.freedesktop.org/archives/wayland-devel/2017-March/033377.html
1.7.0: https://lists.freedesktop.org/archives/wayland-devel/2017-March/033531.html
1.7.1: https://lists.freedesktop.org/archives/wayland-devel/2017-April/033962.html
1.7.2: https://lists.freedesktop.org/archives/wayland-devel/2017-May/034037.html

Lots of fixes, most notably around trackpad support on high-dpi
systems.

pkgs/development/libraries/libinput/default.nix

@@ -17,11 +17,11 @@ in
 with stdenv.lib;
 stdenv.mkDerivation rec {
   name = "libinput-${version}";
-  version = "1.5.1";
+  version = "1.7.2";
 
   src = fetchurl {
     url = "http://www.freedesktop.org/software/libinput/${name}.tar.xz";
-    sha256 = "d4f63933b0967bd691735af5e3919e2d29c2121d4e05867cc4e10ff3ae8e2dd8";
+    sha256 = "0b1e5a6c106ccc609ccececd9e33e6b27c8b01fc7457ddb4c1dd266e780d6bc2";
   };
 
   outputs = [ "out" "dev" ];