Add in the base-files package.

Change-Id: I79223ea727a6250cc8508afb67db9dfca26ab138
diff --git a/default.xml b/default.xml
index e45f0e1..478d776 100644
--- a/default.xml
+++ b/default.xml
@@ -54,6 +54,7 @@
     <project path="packages/aiy-board-keyring" name="aiy-board-keyring" />
     <project path="packages/aiy-board-tools" name="aiy-board-tools" />
     <project path="packages/aiy-board-wlan" name="aiy-board-wlan" />
+    <project path="packages/base-files" name="base-files" />
     <project path="packages/equivs" name="equivs" />
 
     <project path="imx-gstreamer" name="imx-gstreamer" groups="notdefault,imx" />