Properly fix stage error when building non-root.

PR:		193136


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@367075 35697150-7ecd-e111-bb59-0022644237b5
- Add USES=libtool
- Link with -lz


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@367076 35697150-7ecd-e111-bb59-0022644237b5
Update to 1.3.1


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@367077 35697150-7ecd-e111-bb59-0022644237b5