libundo.sh.at: Update 'undo_meta get' inquiries' ref. output
libundo.sh.at: Update 'undo_meta get' inquiries' ref. output

Brings this particular test group up-to-date with:
commit 86c95f7b41c98c9a7fc7bdeca6d8923eabfaba8d
    {emit,session,undo}_meta(): Bound argument count range above 4

donkarlos/libdl-sh