Include Windows.h to ensure HANDLE is defined where _swift_withWin32DbgHelpLibrary() is defined.

Author: grynspan

stdlib/public/runtime/ImageInspection.h

@@ -29,6 +29,12 @@
 #include <memory>
 #include <type_traits>
 
+#if defined(_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#define NOMINMAX
+#include <Windows.h>
+#endif
+
 namespace swift {
 
 /// This is a platform independent version of Dl_info from dlfcn.h