libmatroska: add hash file

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libmatroska/libmatroska.hash

@@ -0,0 +1,2 @@
+# Locally calculated
+sha256	bea10320f1f1fd121bbd7db9ffc77b2518e8269f00903549c5425478bbf8393f	libmatroska-1.4.2.tar.bz2