portconfigure: Remove macports-clang-3.8 from our list of preferred compilers
portconfigure: Remove macports-clang-3.8 from our list of preferred compilers

Signed-off-by: Jeremy Huddleston Sequoia <db3cec0cba09acb9cf8fd8bd399a3b27498cf883@macports.org>

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