[package] mosquitto: upgrade MQTT tools to v1.0.3

[package] mosquitto: upgrade MQTT tools to v1.0.3

Major changes since v0.15 currently in trunk
* SSL/TLS support across the board, broker, clients and client library
* TLS-PSK support if openssl version is new enough
* thread support in client library
* lots and lots of bug fixes

Because prior versions of mosquitto didn't have any SSL support,
I've made the openssl dependency optional (but on by default)

Includes basic UCI config support, originally from:
https://github.com/remakeelectric/owrt_pub_feeds/tree/master/luci-app-mosquitto

Tested with both all -nossl and all regular packages.
(Have to run a "make package/mosquitto/clean" between builds)

[Florian: fix for real variant building, remove check on backfire]

Signed-off-by: Karl Palsson <karlp@remake.is>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@33787 3c298f89-4303-0410-b956-a3cf2f4a3e73