Update ICU to 54.1 step 1

source/common/utypeinfo.h

 /*
 ******************************************************************************
 *
-*   Copyright (C) 2012, International Business Machines
+*   Copyright (C) 2012-2014, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ******************************************************************************
 */
 
 #ifndef __UTYPEINFO_H__
 #define __UTYPEINFO_H__
 
 // Windows header <typeinfo> does not define 'exception' in 'std' namespace.
 // Therefore, a project using ICU cannot be compiled with _HAS_EXCEPTION
 // set to 0 on Windows with Visual Studio. To work around that, we have to
 // include <exception> explicilty and add using statement below.
 // Whenever 'typeid' is used, this header has to be included
 // instead of <typeinfo>.
 // Visual Stuido 10 emits warning 4275 with this change. If you compile
 // with exception disabled, you have to suppress warning 4275.
 #if defined(_MSC_VER) && _HAS_EXCEPTIONS == 0
 #include <exception>
 using std::exception;
 #endif
+#if !defined(_MSC_VER)
+namespace std { class type_info; } // WORKAROUND: http://llvm.org/bugs/show_bug.cgi?id=13364
+#endif
 #include <typeinfo>  // for 'typeid' to work
 
 #endif