Fix for Erlang R16B01

The public_key module from a very recent Erlang R16B01 requires that asn1 module must be started before. See these link for further details and Erlang user's weeps:

* http://thread.gmane.org/gmane.comp.lang.erlang.general/68995/focus=69001
* https://issues.apache.org/jira/browse/COUCHDB-1833
* http://thread.gmane.org/gmane.comp.networking.rabbitmq.general/23889
* http://thread.gmane.org/gmane.comp.lang.erlang.general/69019

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>