SDK: use XSD v5 props when generating repository packages.

This requires sdk.git Change-Id I6993d6c4 to build
(to enable the use of XSD v5).

Change-Id: If3beb09ae4eef3990caf661b2d4cfbdfd8a6f86a
diff --git a/sdk/support_source.properties b/sdk/support_source.properties
index b75e326..cd3a0b0 100644
--- a/sdk/support_source.properties
+++ b/sdk/support_source.properties
@@ -1,2 +1,4 @@
 Pkg.UserSrc=false
 Pkg.Revision=4
+Extra.OldPaths=compatibility
+