Add a regex to catch ocaml errors

[Khady]

OCaml compilers (ocamlc/ocamlopt) provide warnings and errors with this schema:

File "foo/bar.ml", line 277, characters 12-13:
Warning 26: unused variable g.
File "foo/bar.ml", line 280, characters 6-64:
Warning 34: unused type t.
File "foo/bar.ml", line 279, characters 0-6:
Error: Syntax error

I added a regex to errorMatch to catch those warnings and errors.

[noseglid]

Cool thanks!