vorbis-tools: add new recipe

Vorbis tools provide command line editing and playback tools for the
patent free audio codec. Use cases in embedded are audio tests and
performance benchmarks.

Signed-off-by: Stefan Müller-Klieser <s.mueller-klieser@phytec.de>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>