Added PCRE config.tests, and logic and command line options
(-qt-pcre and -system-pcre) for configure and configure.exe.
Change-Id: I5da2658191198dbcf48c07d7c5de1be1b884a7a5
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
