portbuild.tcl: Refine bsdmake auto-dependency further.
portbuild.tcl: Refine bsdmake auto-dependency further.

Remove check on build.cmd because its default value cannot be determined if build.type is "bsd" but a bsdmake executable is not yet present; portbuild::build_getmaketype errors out (see https://trac.macports.org/ticket/38034).

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@103028 d073be05-634f-4543-b044-5fe20cf6d1d6

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