[dovecot/core] b363b9: configure: Fix HAVE_MYSQL_SSL_CIPHER check

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: b363b993619a9b506a94240f8540bc4b9697c675
      https://github.com/dovecot/core/commit/b363b993619a9b506a94240f8540bc4b9697c675
  Author: Paul Howarth <paul at city-fan.org>
  Date:   2016-12-07 (Wed, 07 Dec 2016)

  Changed paths:
    M m4/want_mysql.m4

  Log Message:
  -----------
  configure: Fix HAVE_MYSQL_SSL_CIPHER check