Update glib and add PCRE package
* configure.ac: Add PCRE as source package. * packages/pacakges.current (glib): Update (pcre): New. * src/config.nsi.in, src/inst-pcre.nsi, src/uninst-pcre.nsi, src/inst-sections.nsi: Add new package.
This is the most recent version of glib that does not require
a new build tool integration. It compiles under Debian Bullseye
but does require PCRE so we add PCRE.