rust-cbindgen: adopt

Primary consumer of this package is firefox and spidermonkey, which I
already invest a lot of time in anyway.

pkgs/development/tools/rust/cbindgen/default.nix

@@ -33,6 +33,6 @@ rustPlatform.buildRustPackage rec {
     description = "A project for generating C bindings from Rust code";
     homepage = "https://github.com/eqrion/cbindgen";
     license = licenses.mpl20;
-    maintainers = with maintainers; [ ];
+    maintainers = with maintainers; [ hexa ];
   };
 }