GUAC-236: Add missing LDFLAGS for guacenc.
GUAC-236: Add missing LDFLAGS for guacenc.

glyptodon/guacamole-server,apache/guacamole-server,mike-jumper/incubator-guacamole-server,flangelo/guacamole-server,flangelo/guacamole-server,apache/guacamole-server,apache/guacamole-server,flangelo/guacamole-server,mike-jumper/incubator-guacamole-server,glyptodon/guacamole-server,glyptodon/guacamole-server,flangelo/guacamole-server,mike-jumper/incubator-guacamole-server,mike-jumper/incubator-guacamole-server