jni: use syslog

allows to use android logger

Change-Id: I66af2cb8dd05808f353dcc2dee74fa842718a445

bin/jni/jni_interface.i

@@ -340,7 +340,7 @@ void init(ConfigurationCallback* confM, Callback* callM, PresenceCallback* presM
         exportable_callback<ConversationSignal::ConversationPreferencesUpdated>(bind(&ConversationCallback::conversationPreferencesUpdated, convM, _1, _2, _3))
     };
 
-    if (!libjami::init(static_cast<libjami::InitFlag>(libjami::LIBJAMI_FLAG_DEBUG)))
+    if (!libjami::init(static_cast<libjami::InitFlag>(libjami::LIBJAMI_FLAG_DEBUG | libjami::LIBJAMI_FLAG_SYSLOG)))
         return;
 
     registerSignalHandlers(callEvHandlers);