eliom: fix build with OCaml-4.02

pkgs/development/ocaml-modules/eliom/camlp4.patch

@@ -0,0 +1,24 @@
+--- a/src/_tags	2014-10-01 16:19:35.000000000 +0100
++++ b/src/_tags	2014-11-09 16:55:34.470663377 +0000
+@@ -39,7 +39,7 @@
+ <lib/server/monitor/*.ml{,i}>:I(src/lib/server)
+ 
+ <syntax/pa_*.ml{,i}>: syntax(camlp4o),package(camlp4.quotations.o,camlp4.extend)
+-<syntax/pa_*.ml{,i}>: I(+camlp4/Camlp4Parsers)
++<syntax/pa_*.ml{,i}>: use_camlp4_full
+ 
+ 
+ <ocamlbuild/ocamlbuild_eliom.ml{,i}>: package(ocamlbuild,js_of_ocaml.ocamlbuild)
+
+--- a/src/lib/eliom_registration.server.ml	2014-10-01 16:19:35.000000000 +0100
++++ b/src/lib/eliom_registration.server.ml	2014-11-09 17:26:16.093198699 +0000
+@@ -2440,7 +2440,7 @@
+       (Ocaml.register_post_coservice'
+          ?scope ?options ?charset ?code ?content_type ?headers ?secure_session ?name
+          ?csrf_safe ?csrf_scope ?csrf_secure ?max_use ?timeout ?https ?error_handler
+-         ~post_params:Eliom_parameter.(ocaml "argument" argument_type)
++         ~post_params:(Eliom_parameter.ocaml "argument" argument_type)
+          (fun () argument -> f argument))
+       (Eliom_wrap.create_unwrapper
+          (Eliom_wrap.id_of_int Eliom_common_base.server_function_unwrap_id_int))
+

pkgs/development/ocaml-modules/eliom/default.nix

@@ -14,6 +14,8 @@ stdenv.mkDerivation rec
     sha256 = "10v7mrq3zsbxdlg8k8xif777mbvcdpabvnd1g7p2yqivr7f1qm24";
   };
 
+  patches = [ ./camlp4.patch ];
+
   buildInputs = [ocaml which ocsigen_server findlib ocsigen_deriving
                  js_of_ocaml ocaml_optcomp opam];