[meld/flatpak-ci] data: Validate appstream with no network interaction

[Kai Willadsen <kaiw src gnome org>]

commit 01d5bc198894d4561e2fbc3d70cd01673524aaf6
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Sep 29 10:14:58 2019 +1000

    data: Validate appstream with no network interaction
    
    Otherwise the Meson build fails in the preconfigured xvfb runtime test
    environment.

 data/meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/data/meson.build b/data/meson.build
index e72b189c..842d8ab8 100644
--- a/data/meson.build
+++ b/data/meson.build
@@ -48,6 +48,7 @@ if appstreamcli.found()
     appstreamcli,
     args: [
         'validate-relax',
+        '--nonet',
         appdata_file.full_path()
      ]
   )