Revert "autotools: quote arguments"
Revert "autotools: quote arguments"

This reverts commit 4c13bc39772dfa4022a4d5ba781bfd80a54e5067. I had
tested with an older version of autoconf to ensure I don't breeak it,
and failed to retest with a current version.

macports/macports-base,danchr/macports-base,macports/macports-base,neverpanic/macports-base,danchr/macports-base,neverpanic/macports-base