package/libvorbis: add hash file

Signed-off-by: Jörg Krause <jkrause@posteo.de>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libvorbis/libvorbis.hash

@@ -0,0 +1,2 @@
+# From http://www.xiph.org/downloads/
+sha256 2f05497d29195dc23ee952a24ee3973a74e6277569c4c2eca0ec5968e541f372 libvorbis-1.3.4.tar.xz