Add platform/external/walt
diff --git a/default.xml b/default.xml
index 5a59889..b7e992c 100644
--- a/default.xml
+++ b/default.xml
@@ -658,6 +658,7 @@
   <project name="platform/external/vogar" />
   <project name="platform/external/volley" />
   <project name="platform/external/vulkan-validation-layers" />
+  <project name="platform/external/walt" />
   <project name="platform/external/weave-common" />
   <project name="platform/external/webkit" />
   <project name="platform/external/webp" />