Workaround winrt sdk bug

microsoft/Windows.UI.Composition-Win32-Samples#47 (comment)

Author: tiagoshibata

Samples/SampleSharedLib/SampleSharedLib/pch.h

@@ -1,9 +1,18 @@
 #ifndef PCH_H
 #define PCH_H
 
+#include <winrt/base.h>
+namespace winrt::impl
+{
+    template <typename Async>
+    auto wait_for(Async const& async, Windows::Foundation::TimeSpan const& timeout);
+}
+
+#include <winrt/Windows.Foundation.h>
+#include <winrt/Windows.Graphics.h>
 #include <winrt/Windows.Graphics.Imaging.h>
 #include <winrt/Windows.Storage.h>
-#include "winrt/Windows.Storage.Streams.h"
+#include <winrt/Windows.Storage.Streams.h>
 
 #include <Windows.h>