portpkg: put path of package into log message.
portpkg: put path of package into log message.

The new log message contains everything one needs to parse the log
output to get the port name, version number and pkg path.

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@110694 d073be05-634f-4543-b044-5fe20cf6d1d6

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