package/glmark2: use external waf

Fixes:
http://autobuild.buildroot.net/results/bbd/bbd90f11975b691f694412a6fc3446f37dd7c0aa/

The bundled waf script is too old (1.9.3) for python >= 3.11 as it uses the
'U' modifier to open (universal newlines), which have been deprecated since
python 3.3 and finally removed in 3.11.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/glmark2/glmark2.mk

@@ -10,6 +10,9 @@ GLMARK2_LICENSE = GPL-3.0+, SGIv1
 GLMARK2_LICENSE_FILES = COPYING COPYING.SGI
 GLMARK2_DEPENDENCIES = host-pkgconf jpeg libegl libpng
 
+# The bundled waf script is too old for >= python3.11
+GLMARK2_NEEDS_EXTERNAL_WAF = YES
+
 ifeq ($(BR2_PACKAGE_GLMARK2_FLAVOR_DRM_GLESV2),y)
 GLMARK2_DEPENDENCIES += libdrm libgbm libgles udev
 GLMARK2_FLAVORS += drm-glesv2