Add valgrind test runs to CI
Submitted by Simon McVittie
Assigned to Simon McVittie
Bug #666113 could have been avoided if the GLib tests were semi-regularly run under valgrind. Patches on the way.
Also, it'd be nice if we could install valgrind suppression files for at least some of the "intentional, one-per-process" allocations; at the moment, telepathy-glib and GStreamer both invent their own.