Update ICU to 54.1 step 1

source/i18n/unicode/sortkey.h

 /*
  *****************************************************************************
- * Copyright (C) 1996-2013, International Business Machines Corporation and others.
+ * Copyright (C) 1996-2014, International Business Machines Corporation and others.
  * All Rights Reserved.
  *****************************************************************************
  *
  * File sortkey.h
  *
  * Created by: Helena Shih
  *
  * Modification History:
  *
  *  Date         Name          Description
@@ skipping 17 matching lines @@
 #if !UCONFIG_NO_COLLATION
 
 #include "unicode/uobject.h"
 #include "unicode/unistr.h"
 #include "unicode/coll.h"
 
 U_NAMESPACE_BEGIN
 
 /* forward declaration */
 class RuleBasedCollator;
+class CollationKeyByteSink;
 
 /**
  *
  * Collation keys are generated by the Collator class.  Use the CollationKey objects
  * instead of Collator to compare strings multiple times.  A CollationKey
  * preprocesses the comparison information from the Collator object to
  * make the comparison faster.  If you are not going to comparing strings
  * multiple times, then using the Collator object is generally faster,
  * since it only processes as much of the string as needed to make a
  * comparison.
@@ skipping 277 matching lines @@
 {
     count = getLength();
     return getBytes();
 }
 
 U_NAMESPACE_END
 
 #endif /* #if !UCONFIG_NO_COLLATION */
 
 #endif