gnu: Add ocaml-ppx-jane.

* gnu/packages/ocaml.scm (ocaml-ppx-jane): New variable.

gnu: Add ocaml-ppx-expect.

* gnu/packages/ocaml.scm (ocaml-ppx-expect): New variable.

gnu: Add ocaml-re.

* gnu/packages/ocaml.scm (ocaml-re): New variable.

gnu: Add ocaml-ppx-fields-conv.

* gnu/packages/ocaml.scm (ocaml-ppx-fields-conv): New variable.

gnu: Add ocaml-ppx-sexp-message.

* gnu/packages/ocaml.scm (ocaml-ppx-sexp-message): New variable.

gnu: Add ocaml-ppx-custom-printf.

* gnu/packages/ocaml.scm (ocaml-ppx-custom-printf): New variable.

gnu: Add ocaml-ppx-fail.

* gnu/packages/ocaml.scm (ocaml-ppx-fail): New variable.

gnu: Add ocaml-ppx-bin-prot.

* gnu/packages/ocaml.scm (ocaml-ppx-bin-prot): New variable.

gnu: Add ocaml-ppx-pipebang.

* gnu/packages/ocaml.scm (ocaml-ppx-pipebang): New variable.

gnu: Add ocaml-ppx-sexp-value.

* gnu/packages/ocaml.scm (ocaml-ppx-sexp-value): New variable.

gnu: Add ocaml4.01-batteries.

* gnu/packages/ocaml.scm (ocaml4.01-batteries): New variable.

gnu: Add ocaml4.01-xmlm.

* gnu/packages/ocaml.scm (ocaml4.01-xmlm): New variable.

gnu: Add ocaml4.01-ounit.

* gnu/packages/ocaml.scm (ocaml4.01-ounit): New variable.

gnu: Add ocaml4.01-qtest.

* gnu/packages/ocaml.scm (ocaml4.01-qtest): New variable.

gnu: Add ocaml4.01-camlzip.

* gnu/packages/ocaml.scm (ocaml4.01-camlzip): New variable.

gnu: Add ocaml4.01-csv.

* gnu/packages/ocaml.scm (ocaml4.01-csv): New variable.

gnu: Add ocaml4.01-sqlite3.

* gnu/packages/ocaml.scm: (ocaml4.01-sqlite3): New variable.

gnu: Add ocaml4.01-bisect.

* gnu/packages/ocaml.scm (ocaml4.01-bisect): New variable.
(ocaml-bisect)[properties]: New field.

gnu: Add ocaml4.01-findlib.

* gnu/packages/ocaml.scm (ocaml4.01-findlib): New variable.

gnu: Add ocaml-4.01.

* gnu/packages/ocaml.scm (ocaml-4.01): New variable.