tools/libxenforeignmemory: bind restrict operation to new version

tools/libxenforeignmemory: bind restrict operation to new version

Commit 5823d6eb "add a call to restrict the handle" added a new function
to the foreignmemory API. This API is considered stable and so the new
function should be bound to a new version.

This patch creates version 1.1 of the API, dependent on version 1.0, and
binds the restrict call to version 1.1. Thus version 1.0 is as it was
before the new function was added.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>