spirv-llvm-translator: move spirv-tools to nativeBuildInputs

pkgs/development/compilers/spirv-llvm-translator/default.nix

···
     sha256 = "sha256-/vUyL6Wh8hykoGz1QmT1F7lfGDEmG4U3iqmqrJxizOg=";
   };
 
-  nativeBuildInputs = [ pkg-config cmake llvm_11.dev ];
+  nativeBuildInputs = [ pkg-config cmake llvm_11.dev spirv-tools ];
 
-  buildInputs = [ spirv-headers spirv-tools llvm_11 ];
+  buildInputs = [ spirv-headers llvm_11 ];
 
   checkInputs = [ lit ];