Base: include Window.h on Windows

This header is used pervasively, and we use certain types defined from
this umbrella header.

Author: compnerd

CoreFoundation/Base.subproj/ForSwiftFoundationOnly.h

@@ -26,6 +26,9 @@
 #include <CoreFoundation/CFURLSessionInterface.h>
 #include <CoreFoundation/ForFoundationOnly.h>
 #if DEPLOYMENT_TARGET_WINDOWS
+#define NOMINMAX
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
 #else
 #include <fts.h>
 #endif