Log Message:
Update devel/pcre-ocaml to 5.15.0.
Patch privided by PR 39348.

Changes:
2008-05-06:  Fixed build problem with newer versions of PCRE.

2008-03-14:  Synced with Jane Street tree.

2008-01-25:  Added new function:

               * names

             This function returns the names of all named substrings in a
             regular expression.

             Thanks to Benedikt Grundmann <bgrundmann@janestcapital.com>
             for the patch!

2007-07-12:  Improved build scripts for Windows.

             Thanks to Christophe Troestler
             <Christophe.Troestler@umh.ac.be> for the patch!

2007-07-12:  Improved documentation for Win32 builds, and added some build
             scripts usable on Windows.

             Thanks to Christophe Troestler
             <Christophe.Troestler@umh.ac.be> for this contribution!

2007-04-23:  callback_exn -> caml_callback_exn.

             Updated OCamlMakefile.