databases/libdrizzle-redux: Fix build with Clang 6

libdrizzle/binlog.cc:319:48: error: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wreserved-user-defined-literal]

"packet size error:%"PRIu32":%"PRIu32, con->packet_size, binlog_event->length);
                     ^

http://beefy12.nyi.freebsd.org/data/head-amd64-default/p479076_s338486/logs/errors/libdrizzle-redux-5.1.4_2.log

PR: 230958
Approved by: jim@ohlste.in (maintainer timeout, 2 weeks)