Fix icu link warning on Windows

source/common/unicode/utypes.h

 /*
 **********************************************************************
 *   Copyright (C) 1996-2010, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 *
 *  FILE NAME : UTYPES.H (formerly ptypes.h)
 *
 *   Date        Name        Description
 *   12/11/96    helena      Creation.
@@ skipping 430 matching lines @@
 #define U_TOOLUTIL_API U_EXPORT
 #elif defined(U_STATIC_IMPLEMENTATION)
 #define U_DATA_API
 #define U_COMMON_API
 #define U_I18N_API
 #define U_LAYOUT_API
 #define U_LAYOUTEX_API
 #define U_IO_API
 #define U_TOOLUTIL_API
 #elif defined(U_COMMON_IMPLEMENTATION)
-#define U_DATA_API     U_IMPORT
+#define U_DATA_API     U_EXPORT
 #define U_COMMON_API   U_EXPORT
 #define U_I18N_API     U_IMPORT
 #define U_LAYOUT_API   U_IMPORT
 #define U_LAYOUTEX_API U_IMPORT
 #define U_IO_API       U_IMPORT
 #define U_TOOLUTIL_API U_IMPORT
 #elif defined(U_I18N_IMPLEMENTATION)
 #define U_DATA_API     U_IMPORT
 #define U_COMMON_API   U_IMPORT
 #define U_I18N_API     U_EXPORT
@@ skipping 394 matching lines @@
  * Return a string for a UErrorCode value.
  * The string will be the same as the name of the error code constant
  * in the UErrorCode enum above.
  * @stable ICU 2.0
  */
 U_STABLE const char * U_EXPORT2
 u_errorName(UErrorCode code);
 
 
 #endif /* _UTYPES */