Add default version files into the SDK for docs/tools/platforms.
diff --git a/build/sdk.atree b/build/sdk.atree
index 72de93b..aaff56c 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -18,6 +18,11 @@
# These are the files that comprise that SDK
#
+# version files for the SDK updater
+development/tools/scripts/doc_source.properties docs/source.properties
+development/tools/scripts/tools_source.properties tools/source.properties
+development/tools/scripts/platform_source.properties platforms/${PLATFORM_NAME}/source.properties
+
# host tools from out/host/$(HOST_OS)-$(HOST_ARCH)/
bin/aapt platforms/${PLATFORM_NAME}/tools/aapt
bin/aidl platforms/${PLATFORM_NAME}/tools/aidl