gst1-validate: new package

Example usages can be found at [1].

[1] http://blogs.gnome.org/tsaunier/2014/04/21/gst-validate-a-suite-of-tools-to-run-integration-tests-for-gstreamer-2/



Signed-off-by: Peter Seiderer <ps.report@gmx.net>

Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
 [build test on minimal internal x86_64 toolchain]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>