CP-38064: update usage of epoll to Core 0.14.0

Signed-off-by: Pau Ruiz Safont <pau.safont@citrix.com>

Author: psafont

xc/device.ml

@@ -3290,8 +3290,8 @@ module Backend = struct
 
     (** File-descriptor event monitor implementation for the epoll library *)
     module Monitor = struct
-      module Epoll = Core.Linux_ext.Epoll
-      module Flags = Core.Linux_ext.Epoll.Flags
+      module Epoll = Linux_ext.Epoll
+      module Flags = Linux_ext.Epoll.Flags
 
       let num_file_descrs =
         match Core.Unix.RLimit.((get num_file_descriptors).cur) with

xc/dune

@@ -6,6 +6,7 @@
 
  (libraries
    astring
+   core.linux_ext
    xenctrl
    xapi-xenopsd
    xenstore