[dovecot/core] 2fc183: configure: Add support for EXTRA_LDFLAGS

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 2fc183541ffd0e9aeb08dc2ea4cac081706034b6
      https://github.com/dovecot/core/commit/2fc183541ffd0e9aeb08dc2ea4cac081706034b6
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2017-10-30 (Mon, 30 Oct 2017)

  Changed paths:
    M configure.ac

  Log Message:
  -----------
  configure: Add support for EXTRA_LDFLAGS