tools: libxl: add an Enumeration type to the IDL

The IDL requires a specific value for each enumerate, this make it
much easier to avoid (or at least track) ABI changes since they must
now be explicit.

I believe I have used the same values as would have been chosen
previoulsy but have not confirmed.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>

tools/python/xen/lowlevel/xl/xl.c

@@ -769,35 +769,6 @@ PyMODINIT_FUNC initxl(void)
     _INT_CONST(m, SHUTDOWN_crash);
     _INT_CONST(m, SHUTDOWN_watchdog);
 
-    _INT_CONST_LIBXL(m, DOMAIN_TYPE_FV);
-    _INT_CONST_LIBXL(m, DOMAIN_TYPE_PV);
-
-    _INT_CONST_LIBXL(m, CONSOLE_TYPE_SERIAL);
-    _INT_CONST_LIBXL(m, CONSOLE_TYPE_PV);
-
-    _INT_CONST_LIBXL(m, CONSOLE_BACKEND_XENCONSOLED);
-    _INT_CONST_LIBXL(m, CONSOLE_BACKEND_IOEMU);
-
-    _INT_CONST_LIBXL(m, DISK_FORMAT_UNKNOWN);
-    _INT_CONST_LIBXL(m, DISK_FORMAT_QCOW);
-    _INT_CONST_LIBXL(m, DISK_FORMAT_QCOW2);
-    _INT_CONST_LIBXL(m, DISK_FORMAT_VHD);
-    _INT_CONST_LIBXL(m, DISK_FORMAT_RAW);
-    _INT_CONST_LIBXL(m, DISK_FORMAT_EMPTY);
-
-    _INT_CONST_LIBXL(m, DISK_BACKEND_UNKNOWN);
-    _INT_CONST_LIBXL(m, DISK_BACKEND_PHY);
-    _INT_CONST_LIBXL(m, DISK_BACKEND_TAP);
-    _INT_CONST_LIBXL(m, DISK_BACKEND_QDISK);
-
-    _INT_CONST_LIBXL(m, NIC_TYPE_IOEMU);
-    _INT_CONST_LIBXL(m, NIC_TYPE_VIF);
-
-    _INT_CONST_LIBXL(m, EVENT_TYPE_DOMAIN_DEATH);
-    _INT_CONST_LIBXL(m, EVENT_TYPE_DISK_EJECT);
-
-    _INT_CONST_LIBXL(m, BUTTON_POWER);
-    _INT_CONST_LIBXL(m, BUTTON_SLEEP);
     genwrap__init(m);
 }