[klibc] Add swap support to fstype

[H. Peter Anvin]

David Härdeman wrote:
> This patch adds support for swap detection to fstype (to be applied on 
> top of the previous luks patch).

Would it be too much to ask to resubmit both patches against the top of 
the git tree (the files have moved, so it makes it a bit awkward to 
merge with all the patch info intact)?

	-hpa