* Looks more logical to keep share/registry/'s xcscxu and res layers together.

* Lets the winreg code actually get executed by developers using the instdir/
  instset.  (Though it doesn't enable it during in-build tests, which typically
  use their own CONFIGURATION_LAYERS settings.)

Change-Id: I49dd3a16773047f7d4dc372c60a58ada1970970a