package/efl/libevas: explicitly disable xlib support

Fixes:
http://autobuild.buildroot.net/results/d69/d69a324434f370b490a53e6191d38a204ac28371

Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/efl/libevas/libevas.mk

@@ -72,6 +72,8 @@ LIBEVAS_CONF_OPTS += --enable-gl-xlib
 LIBEVAS_DEPENDENCIES += \
 	xproto_glproto xlib_libX11 xlib_libXrender \
 	xlib_libXext libeet
+else
+LIBEVAS_CONF_OPTS += --disable-gl-xlib
 endif
 
 ifeq ($(BR2_PACKAGE_LIBEVAS_XCB),y)