Make Win32's header file name lower for cross build on case-sensitive filesystem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124864 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Windows/PathV2.inc b/lib/Support/Windows/PathV2.inc
index b36b291..8effb0c 100644
--- a/lib/Support/Windows/PathV2.inc
+++ b/lib/Support/Windows/PathV2.inc
@@ -17,7 +17,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "Windows.h"
-#include <WinCrypt.h>
+#include <wincrypt.h>
 #include <fcntl.h>
 #include <io.h>
 #include <sys/stat.h>
diff --git a/lib/Support/Windows/Windows.h b/lib/Support/Windows/Windows.h
index 6e0b585..dfa4be3 100644
--- a/lib/Support/Windows/Windows.h
+++ b/lib/Support/Windows/Windows.h
@@ -22,8 +22,8 @@
 #define WIN32_LEAN_AND_MEAN
 
 #include "llvm/Config/config.h" // Get build system configuration settings
-#include <Windows.h>
-#include <ShlObj.h>
+#include <windows.h>
+#include <shlobj.h>
 #include <cassert>
 #include <string>
 
diff --git a/lib/Support/Windows/system_error.inc b/lib/Support/Windows/system_error.inc
index 64753d0..37ec81d 100644
--- a/lib/Support/Windows/system_error.inc
+++ b/lib/Support/Windows/system_error.inc
@@ -17,8 +17,8 @@
 //===          is guaranteed to work on *all* Windows variants.
 //===----------------------------------------------------------------------===//
 
-#include <Windows.h>
-#include <WinError.h>
+#include <windows.h>
+#include <winerror.h>
 
 using namespace llvm;
 
diff --git a/utils/unittest/UnitTestMain/TestMain.cpp b/utils/unittest/UnitTestMain/TestMain.cpp
index 4469c03..b35bae5 100644
--- a/utils/unittest/UnitTestMain/TestMain.cpp
+++ b/utils/unittest/UnitTestMain/TestMain.cpp
@@ -13,7 +13,7 @@
 
 
 #if defined(LLVM_ON_WIN32)
-# include <Windows.h>
+# include <windows.h>
 # if defined(_MSC_VER)
 #   include <crtdbg.h>
 # endif