HPCC-11522 libmemcached plugin

Previously: #6368 & #6686

Signed-off-by: jamienoss <james.noss@lexisnexis.com>
Originally they did not, and the text in the log was added like this:

0000000B 2014-11-26 11:08:44 24539 24539 USER: libmemcached server stat - pid:22416
libmemcached server stat - uptime:443
libmemcached server stat - time:1417000123
libmemcached server stat - version:1.4.20
libmemcached server stat - pointer_size:64
libmemcached server stat - rusage_user:0.18458
libmemcached server stat - rusage_system:0.9521
libmemcached server stat - curr_items:1

I just swapped it over to 

0000000B 2014-11-26 11:08:44 24539 24539 USER:
libmemcached server stat - pid:22416
libmemcached server stat - uptime:443
libmemcached server stat - time:1417000123
libmemcached server stat - version:1.4.20