Allow staging as a regular user


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@368078 35697150-7ecd-e111-bb59-0022644237b5
Convert to USES=libtool and INSTALL_TARGET=install-strip


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@368079 35697150-7ecd-e111-bb59-0022644237b5