meson: fix with_dri2 definition for GNU Hurd

Suggested-by: Dylan Baker <dylan@pnwbakers.com>
Cc: Timo Aaltonen <tjaalton@debian.org>
Cc: James Clarke <jrtc27@debian.org>
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
diff --git a/meson.build b/meson.build
index 46f86eb..8a40c48 100644
--- a/meson.build
+++ b/meson.build
@@ -376,7 +376,8 @@
   with_vulkan_icd_dir = join_paths(get_option('datadir'), 'vulkan/icd.d')
 endif
 
-with_dri2 = (with_dri or with_any_vk) and with_dri_platform == 'drm'
+with_dri2 = (with_dri or with_any_vk) and (with_dri_platform == 'drm' or
+  host_machine.system() == 'gnu')
 _dri3 = get_option('dri3')
 if _dri3 == 'auto'
   with_dri3 = system_has_kms_drm and with_dri2