PrePeiCoreMPCore reuses the GUID of its unicore sibling, which is usually fine, given that platforms never include both. However, it prevents us from creating a package .DSC that does include both, so update the GUID to a fresh one. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>