Don't install header files unless told so
Don't install header files unless told so

Change-Id: I9c1b88fe2501800de211ab5ac7f11910590bca46
Reviewed-on: http://review.couchbase.org/32435
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

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