Upgrade the PCRE bundle to 8.34

New upstream version, changelogs at:
http://pcre.org/news.txt
http://pcre.org/changelog.txt

Qt still requires 8.30.

Change-Id: I76794a3079601b07c469b952367f71f794079edc
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>