MB-5324 [forward port] CXXFLAGS needs -m64
MB-5324 [forward port] CXXFLAGS needs -m64

Change-Id: I852d40ea20f0df711b5347f5c2b984fff068e84e
Reviewed-on: http://review.couchbase.org/16177
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

mrkwse/memcached,couchbase/memcached,daverigby/kv_engine,daverigby/memcached,cloudrain21/memcached-1,cloudrain21/memcached-1,daverigby/kv_engine,owendCB/memcached,abhinavdangeti/memcached,daverigby/kv_engine,owendCB/memcached,cloudrain21/memcached-1,daverigby/kv_engine,owendCB/memcached,abhinavdangeti/memcached,cloudrain21/memcached-1,mrkwse/memcached,mrkwse/memcached,jimwwalker/memcached,daverigby/memcached,couchbase/memcached,daverigby/memcached,owendCB/memcached,daverigby/memcached,abhinavdangeti/memcached,couchbase/memcached,jimwwalker/memcached,jimwwalker/memcached,abhinavdangeti/memcached,couchbase/memcached,mrkwse/memcached,abhinavdangeti/memcached