mirage/mirage-platform — pull request #78 by djs55 (2013-12-09 13:41:18+00:00)
Title: xen: set Sys.os_type to "Unix" instead of "xen"

The stdlib Filename module calls 'assert false' if it doesn't
recognise the os_type. Might as well be Unix.

Signed-off-by: David Scott