Disable COMDAT folding and OptimizeReferences for debug WinRT In some configs these are enabled by default, and they causes linker warnings (which are treated as errors). BUG=angleproject:1250 Change-Id: Ia8d28e313c91f1d63248aa5c68d29f9c69b8d596 Reviewed-on: https://chromium-review.googlesource.com/317566 Tryjob-Request: Austin Kinross <aukinros@microsoft.com> Tested-by: Austin Kinross <aukinros@microsoft.com> Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>