Log Message:
Updated pcre to 8.39.

Release 8.39 14-June-2016
-------------------------

Some appropriate PCRE2 JIT improvements have been retro-fitted to PCRE1. Apart
from that, this is another bug-fix release. Note that this library (now called
PCRE1) is now being maintained for bug fixes only. New projects are advised to
use the new PCRE2 libraries.