Log Message:
Updated ocaml-findlib to 1.7.1.

Fix man page installation.

Changes:

1.7.1:
added missing file to tarball

1.7.0:
New command "ocamlfind printppx" that outputs
how the ppx preprocessor would be called (Hendrik Tews).

Support for the raw_spacetime library that comes with
OCaml 4.04 (Gerd Stolpmann with help from Mark Shinwell).

Require that ocamlc and ocamlc.opt are installed to the
same directory for emitting the "opt" setting in the generated
config file - same for ocamlopt.opt, ocamldep.opt, ocamldoc.opt.