openconnect: update from 5.01 to 5.02 (CVE-2013-7098)

OpenConnect v5.02 - 2014-01-01:
* Fix XML POST issues with authgroups by falling back to old style login.
* Fix --cookie-on-stdin with cookies from ocserv.
* Fix reconnection to wrong host after redirect.
* Reduce limit of queued packets on DTLS socket, to fix VoIP latency.
* Fix Solaris build breakage due to missing <string.h> includes.
* Include path in <group-access> node.
* Include supporting CA certificates from PKCS#11 tokens (with GnuTLS 3.2.7+).
* Fix possible heap overflow if MTU is increased on reconnection (CVE-2013-7098).