Fix and clean up listing of macro expansion

Fix and clean up listing of macro expansion

Fix the printing of the macro stack: we need to follow the
mstk->next_active list, not mstk->next, and we need to reverse the
order so that the highest-level inclusion comes first.

Since this should be a rare or at least performance-insensitive
operation, do it using simple function recursion.

Finally, add an ellipsis before the "from macro" message; it greatly
enhances readability.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>