spotify-tray: fix building with Automake 1.16.5

pkgs/applications/misc/spotify-tray/default.nix

···
-{ lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config, gtk3 }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, autoreconfHook, pkg-config, gtk3 }:
 
 stdenv.mkDerivation rec {
   pname = "spotify-tray";
···
     rev = "v${version}";
     sha256 = "sha256-E86rA8cBjy/bI7sZHlT40o7i23PcONXT5GTHEfcaDf0=";
   };
+
+  patches = [
+    (fetchpatch {
+      name = "fix-building-with-automake-1.16.5.patch";
+      url = "https://github.com/tsmetana/spotify-tray/commit/1305f473ba4a406e907b98c8255f23154f349613.patch";
+      sha256 = "sha256-u2IopfMzNCu2F06RZoJw3OAsRxxZYdIMnKnyb7/KBgk=";
+    })
+  ];
 
   nativeBuildInputs = [ autoreconfHook pkg-config ];