Update ICU to 54.1 step 1

source/io/unicode/ustream.h

 /*
 **********************************************************************
-*   Copyright (C) 2001-2011 International Business Machines
+*   Copyright (C) 2001-2014 International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 *  FILE NAME : ustream.h
 *
 *   Modification History:
 *
 *   Date        Name        Description
 *   06/25/2001  grhoten     Move iostream from unistr.h
 ******************************************************************************
 */
 
 #ifndef USTREAM_H
 #define USTREAM_H
 
 #include "unicode/unistr.h"
 
+#if !UCONFIG_NO_CONVERSION  // not available without conversion
+
 /**
  * \file
  * \brief C++ API: Unicode iostream like API
  *
  * At this time, this API is very limited. It contains
  * operator<< and operator>> for UnicodeString manipulation with the
  * C++ I/O stream API.
  */
 
+#if !defined(_MSC_VER)
+namespace std { class type_info; } // WORKAROUND: http://llvm.org/bugs/show_bug.cgi?id=13364
+#endif
+
 #if U_IOSTREAM_SOURCE >= 199711
 #if (__GNUC__ == 2)
 #include <iostream>
 #else
 #include <istream>
 #include <ostream>
 #endif
 
 U_NAMESPACE_BEGIN
 
@@ skipping 13 matching lines @@
  * @stable 3.0
  */
 U_IO_API std::istream & U_EXPORT2 operator>>(std::istream& stream, UnicodeString& s);
 U_NAMESPACE_END
 
 #endif
 
 /* No operator for UChar because it can conflict with wchar_t  */
 
 #endif
+#endif