System/Windows: Use normalized case and include method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118503 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Win32/Win32.h b/lib/System/Win32/Win32.h
index 02ca9d3..55ab3e7 100644
--- a/lib/System/Win32/Win32.h
+++ b/lib/System/Win32/Win32.h
@@ -20,7 +20,7 @@
#define _WIN32_WINNT 0x0500
#include "llvm/Config/config.h" // Get build system configuration settings
-#include "windows.h"
+#include <Windows.h>
#include <cassert>
#include <string>