libXext should not try to build into a pure wayland platform.

libXext should not try to build into a pure wayland platform.

This package is designed for an X server platform.

In a system released, based exclusively on Wayland platform, it should be in a excluded status.

Tizen devel  | Tizen release
_____________|______________
succeeded    | succeeded
excluded     | excluded
broken       |
failed       |
unresolvable |
blocked      |
locked       |
note:
    - The disabled status is only
      allowed for OBS administration.

Change-Id: I9dc1ad673a22452633d40b9d7001672547f78a1d
Signed-off-by: Ronan Le Martret <ronan@fridu.net>