Spew less when updating appstream branch

Missing icons are now only visible in verbose logs, and we don't
print warnings about missing appdata for runtimes (such as locale
and debug extensions).

common/flatpak-utils.c

@@ -2261,11 +2261,21 @@ copy_icon (const char *id,
   g_autoptr(GFile) dest_file = g_file_get_child (dest_size_dir, icon_name);
   g_autoptr(GInputStream) in = NULL;
   g_autoptr(GOutputStream) out = NULL;
+  g_autoptr(GError) my_error = NULL;
   gssize n_bytes_written;
 
-  in = (GInputStream *) g_file_read (icon_file, NULL, error);
+  in = (GInputStream *) g_file_read (icon_file, NULL, &my_error);
   if (!in)
-    return FALSE;
+    {
+      if (g_error_matches (my_error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
+        {
+          g_debug ("No icon at size %s", size);
+          return TRUE;
+        }
+
+      g_propagate_error (error, g_steal_pointer (&my_error));
+      return FALSE;
+    }
 
   if (!flatpak_mkdir_p (dest_size_dir, NULL, error))
     return FALSE;
@@ -2512,7 +2522,8 @@ flatpak_repo_generate_appstream (OstreeRepo   *repo,
                                   ref, split[1], tmpdir_file,
                                   cancellable, &my_error))
             {
-              g_print ("No appstream data for %s: %s\n", ref, my_error->message);
+              if (g_str_has_prefix (ref, "app/"))
+                g_print ("No appstream data for %s: %s\n", ref, my_error->message);
               continue;
             }
         }