Remove newest GStreamer and keep 0.10 version

qtmultimedia is compatible only to GStreamer 0.10, so the
following components have been removed:

* gstreamer
* gst-plugins-base
* gst-plugins-good
glib: Tag to 2.35.4 so that gstreamer-0.10 builds

In a recent point release some glib stuff got deprecated and this
breaks gstreamer-0.10 builds.
pcre: Use tarballs copy

Use pcre 8.32 tarballs copy.
qtbase: Build with debugging information enabled

Include debugging information (it will go to the debug target).
qtjsondb: Enable because it builds again

It builds again against qtbase dev branch so we can enable it.