Improve ocamldep error handling
Improve ocamldep error handling

 In case of syntax error while reading a file, ocamldep used to completely
ignore the file. The new behavior is to compute no dependency from the file
content, but still print dependencies between implementations and
interfaces if needed.



git-svn-id: e7e61699ce1738538ffebb75374fbea0924bc775@12214 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02

yunxing/ocaml,hhugo/camlp4,yallop/camlp4,eliberis/ocaml,msprotz/ocaml,yunxing/ocaml,yunxing/ocaml,eliberis/ocaml,eliberis/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,msprotz/ocaml,gerdstolpmann/ocaml,yunxing/ocaml,eliberis/ocaml,chambart/camlp4,yunxing/ocaml,eliberis/ocaml,msprotz/ocaml,msprotz/ocaml,gerdstolpmann/ocaml,msprotz/ocaml,gerdstolpmann/ocaml