Add aiy-board-tools to manifest

Change-Id: Id3170fd7f4ba70faf91ed05677d925f3cbc4b769
diff --git a/default.xml b/default.xml
index 6ce4e83..8613abd 100644
--- a/default.xml
+++ b/default.xml
@@ -44,6 +44,7 @@
     <project path="packages/aiy-board-audio" name="aiy-board-audio" />
     <project path="packages/aiy-board-gadget" name="aiy-board-gadget" />
     <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/equivs" name="equivs" />