xcp-sm: Import Storage Managers

Signed-off-by: Euan Harris <euan.harris@citrix.com>
specs: Don't build debuginfo packages for OCaml packages

Signed-off-by: Euan Harris <euan.harris@citrix.com>
xenopsd: Remove qemu-system-x86 dependency

Signed-off-by: Euan Harris <euan.harris@citrix.com>
Merge pull request #191 from euanh/build-improvements

Build improvements