Fix LLDB build.

This was broken due to directly including windows.h, which
caused a problem when someone in LLVM called std::min in a header
file.  LLDB has a windows.h include to work around this, but it
wasn't being used in these two files.

llvm-svn: 306186

lldb/source/Core/IOHandler.cpp

@@ -58,7 +58,7 @@
 #include "llvm/ADT/StringRef.h" // for StringRef
 
 #ifdef _MSC_VER
-#include <windows.h>
+#include "lldb/Host/windows/windows.h"
 #endif
 
 #include <memory> // for shared_ptr

lldb/source/Core/Mangled.cpp

@@ -10,7 +10,7 @@
 #include "lldb/Core/Mangled.h"
 
 #if defined(_WIN32)
-#include <windows.h>
+#include "lldb/Host/windows/windows.h"
 
 #include <dbghelp.h>
 #pragma comment(lib, "dbghelp.lib")