package/libsvgtiny: add license hash

Partly fixes:
http://autobuild.buildroot.net/results/f0f/f0fd05ce8a8b595015baf625481b58967df53458/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libsvgtiny/libsvgtiny.hash

@@ -1,2 +1,3 @@
 # Locally computed
 sha256 082a2e8849f05e2364a942eec51a798d637c6eca44db8c73350a038ebd1fd268  libsvgtiny-ea9d99fc8b231c22d06168135e181d61f4eb2f06.tar.gz
+sha256 92b965c77be71661cae51425a6b40a5ca274f44cc13c723c90fb471a9a26a828  README