xserver_xorg-server: add missing select BR2_PACKAGE_MCOOKIE

Fixes:

  http://autobuild.buildroot.org/results/7af/7afbf93492819ce59141f056f72679e4cdec0649/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/x11r7/xserver_xorg-server/Config.in

@@ -5,6 +5,7 @@ config BR2_PACKAGE_XSERVER_XORG_SERVER
 	# libgcrypt are already part of the build, we'll use one of
 	# them, otherwise, use the small libsha1 library.
 	select BR2_PACKAGE_LIBSHA1 if (!BR2_PACKAGE_OPENSSL && !BR2_PACKAGE_LIBGCRYPT)
+	select BR2_PACKAGE_MCOOKIE
 	select BR2_PACKAGE_PIXMAN
 	select BR2_PACKAGE_XFONT_FONT_ALIAS if !BR2_PACKAGE_XSERVER_XORG_SERVER_BUILTIN_FONTS
 	select BR2_PACKAGE_XFONT_FONT_MISC_MISC if !BR2_PACKAGE_XSERVER_XORG_SERVER_BUILTIN_FONTS