Bug#718767: transition: ocaml 4.00.1

[Jon Ludlam <jonathan.ludlam@eu.citrix.com>]

Hmm, I'm not having much success in replicating the build environment 
for this - however, I did notice two patches in the ubuntu xen-api 
package that look relevant. The build failure appears to be related to 
xenguest, and there is a patch 'xenguest-4.2.patch' which looks worth a 
test. Also, I noticed another patch 'fix-xen-4.2-paths.patch' that might 
be relevant. Thomas, could you try these patches? If they don't work, 
perhaps you could (off list) advise me on how to set up the environment 
for building.

Thanks!