Don't disable COMDAT folding or OptimizeReferences in WinRT This is bloating the WinRT binaries unnecessarily. BUG=angleproject:1250 Change-Id: I87fa2422e7d58374329956540d03933b0177234b Reviewed-on: https://chromium-review.googlesource.com/316820 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>