XENBUS 35, XENVIF 37

XENBUS
Re-try AuxKlibQueryModuleInformation() if buffer was too small

XENVIF
Re-try AuxKlibQueryModuleInformation() if buffer was too small

Signed-off-by: Ben Chalmers <Ben.Chalmers@citrix.com>
Merge pull request #52 from benchalmers/xb35xv37

XENBUS 35, XENVIF 37

Approved-By: Ben Chalmers <Ben.Chalmers@citrix.com>