beegfs: restrict kernel version

BeeGFS 6.17 fails to build with Linux 4.14.

pkgs/os-specific/linux/beegfs/kernel-module.nix

···
 
   nativeBuildInputs = [ which kmod ];
 
+  buildInputs = kernel.moduleBuildDependencies;
+
   makeFlags = [ "KDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build/" ];
 
   postPatch = ''
···
     platforms = [ "i686-linux" "x86_64-linux" ];
     license = licenses.gpl2;
     maintainers = with maintainers; [ markuskowa ];
+    broken = versionAtLeast kernel.version "4.14";
   };
 }