Update ICU to 58.1

source/common/ucnv_io.h

Index: source/common/ucnv_io.h
diff --git a/source/common/ucnv_io.h b/source/common/ucnv_io.h
index 060ffd05953db4ab1734514ccc6f231072627926..8b3585786d32380c60609d927d949fbba27f4e40 100644
--- a/source/common/ucnv_io.h
+++ b/source/common/ucnv_io.h
@@ -1,3 +1,5 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
  **********************************************************************
  *   Copyright (C) 1999-2006, International Business Machines
@@ -75,10 +77,10 @@ typedef struct UConverterAlias {
 #   error U_CHARSET_FAMILY is not valid
 #endif
 
-U_CAPI char * U_EXPORT2
+U_CAPI char * U_CALLCONV
 ucnv_io_stripASCIIForCompare(char *dst, const char *name);
 
-U_CAPI char * U_EXPORT2
+U_CAPI char * U_CALLCONV
 ucnv_io_stripEBCDICForCompare(char *dst, const char *name);
 
 /**
@@ -91,7 +93,7 @@ ucnv_io_stripEBCDICForCompare(char *dst, const char *name);
  * @param pErrorCode The error code
  * @return the converter name in mixed-case, return NULL if the alias is not found.
  */
-U_CFUNC const char *
+U_CAPI const char *
 ucnv_io_getConverterName(const char *alias, UBool *containsOption, UErrorCode *pErrorCode);
 
 /**
@@ -99,7 +101,7 @@ ucnv_io_getConverterName(const char *alias, UBool *containsOption, UErrorCode *p
  * @param pErrorCode The error code
  * @return the number of all aliases
  */
-U_CFUNC uint16_t
+U_CAPI uint16_t
 ucnv_io_countKnownConverters(UErrorCode *pErrorCode);
 
 /**