roccat-tools: apply workaround for missing hb.h

Same issue as https://github.com/NixOS/nixpkgs/pull/75789

pkgs/os-specific/linux/roccat-tools/default.nix

@@ -1,5 +1,6 @@
 { stdenv, fetchurl, cmake, pkgconfig, gettext
 , dbus, dbus-glib, libgaminggear, libgudev, lua
+, harfbuzz
 }:
 
 stdenv.mkDerivation rec {
@@ -32,6 +33,8 @@ stdenv.mkDerivation rec {
     "-DLIBDIR=lib"
   ];
 
+  NIX_CFLAGS_COMPILE = [ "-I${harfbuzz.dev}/include/harfbuzz" ];
+
   meta = {
     description = "Tools to configure ROCCAT devices";
     homepage = "http://roccat.sourceforge.net/";