PR#6475: accept -o in ocamlc when compiling C files

(Vincent Laporte, Peter Zotov)

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@15734 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
minor: cut too-long lines

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@15735 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02