portconfigure.tcl: default to apple-gcc-4.2 on Tiger to fix various issues (https://trac.macports.org/ticket/41782)
portconfigure.tcl: default to apple-gcc-4.2 on Tiger to fix various issues (https://trac.macports.org/ticket/41782)

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@115646 d073be05-634f-4543-b044-5fe20cf6d1d6

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