Update to 1.8.13


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@373661 35697150-7ecd-e111-bb59-0022644237b5
Allow building with bison 3

PR:		ports/194680


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@373662 35697150-7ecd-e111-bb59-0022644237b5