package/softether: fix hash

The tarball downloaded today from github does not match the checksum
which once was valid.

Comparing both
https://github.com/SoftEtherVPN/SoftEtherVPN/archive/1e17c9bcfd7e7b31756aa5389bcbff76c2c9c88a/softether-1e17c9bcfd7e7b31756aa5389bcbff76c2c9c88a.tar.gz
http://sources.buildroot.net/softether-1e17c9bcfd7e7b31756aa5389bcbff76c2c9c88a.tar.gz
shows no differences in content.

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

package/softether/softether.hash

@@ -1,2 +1,2 @@
 # Locally computed
-sha256 4bdcc05fcd163eea735444283264e40b86626d24fddf110aa416f2c8cb82448b softether-1e17c9bcfd7e7b31756aa5389bcbff76c2c9c88a.tar.gz
+sha256 159032e69776dea3b5e9df9be147568c76fb640b754778adb173e3018f56ba20 softether-1e17c9bcfd7e7b31756aa5389bcbff76c2c9c88a.tar.gz