[packages] bitlbee: Bump to 3.2

sent in by : Brian Stanback <stanback@gmail.com>
Patchwork-Id: 4031
patches are also posted to Trac: https://dev.openwrt.org/ticket/14119
[packages] libotr: added libotr 3.2.1 package to support Bitlbee OTR config option

added a new package for libotr which is used by the optional
CONFIG_BITLBEE_OTR setting for off-the-record encryption support.

sent in by: Brian Stanback <stanback@gmail.com>
Patchwork-Id: 4031

also posted to Trac: https://dev.openwrt.org/ticket/14119