Fix build cycle between xenstore and xenstore_transport by removing
the client_unix test.

This whole test should be moved to a different repository, leaving
this one as the `portable core`.

Signed-off-by: Anil Madhavapeddy <anil@recoil.org>
Merge pull request #9 from avsm/fix-build-cycle

Fix build cycle between xenstore and xenstore_transport by removing
The watch callback thread wasn't dealing with exceptions

This commit fixes this and also removes logging to stderr
in favour of a logging callback.

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Merge pull request #10 from jonludlam/fix-watch-callback-thread

The watch callback thread wasn't dealing with exceptions