Ran dfix on druntime and replaced old alias syntax

There were a couple bugs in the dfix output that I had to manually replace, but most of this patch was automatically generated.  I then manually checked it, though after a certain point my eyes glazed over on simple type aliasing, ie those without parametrized types or function/delegate pointers, as it was getting them all right.

The alignment on a column is mucked up in some places so that the reading flow isn't as good, will look into getting that whitespace formatting right if this pull is otherwise deemed worthwhile.