log long characteristic value event and gatt query complete events

git-svn-id: http://btstack.googlecode.com/svn/trunk@3056 1a0a8af8-31b5-11de-8e0c-53a27eea117e
fix crash on connection failure

git-svn-id: http://btstack.googlecode.com/svn/trunk@3057 1a0a8af8-31b5-11de-8e0c-53a27eea117e