curaengine: patch for compatibility with cmake 3.12 (#45869)

pkgs/applications/misc/curaengine/default.nix

···
-{ stdenv, fetchFromGitHub, cmake, libarcus, stb }:
+{ stdenv, fetchFromGitHub, fetchpatch, cmake, libarcus, stb }:
 
 stdenv.mkDerivation rec {
   name = "curaengine-${version}";
···
     rev = version;
     sha256 = "083jmhzmb60rmqw0fhbnlxyblzkmpn3k6zc75xq90x5g3h60wib4";
   };
+
+  patches = [
+    # Fixed upstream, but not yet released
+    (fetchpatch {
+      url = "https://github.com/Ultimaker/CuraEngine/commit/5aad55bf67e52ce5bdb27a3925af8a4cab441b38.patch";
+      sha256 = "1hxbslzhkvdg8p33mvlbrpw62gwfqpsdbfca6yhdng9hifl86j3f";
+    })
+  ];
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ libarcus stb ];