ICU 56 update step 1

Run scripts/update.sh to get icu 56.1 from the upstream while
preserving local configuration files and converter files.

BUG=575007
TEST=None

Review URL: https://codereview.chromium.org/1621843002 .
diff --git a/source/tools/toolutil/udbgutil.cpp b/source/tools/toolutil/udbgutil.cpp
index efad363..d4f22a0 100644
--- a/source/tools/toolutil/udbgutil.cpp
+++ b/source/tools/toolutil/udbgutil.cpp
@@ -1,6 +1,6 @@
 /********************************************************************
  * COPYRIGHT:
- * Copyright (c) 2007-2013, International Business Machines Corporation and
+ * Copyright (c) 2007-2015, International Business Machines Corporation and
  * others. All Rights Reserved.
  ********************************************************************/
 
@@ -17,6 +17,8 @@
 To add a new enum type
       (For example: UShoeSize  with values USHOE_WIDE=0, USHOE_REGULAR, USHOE_NARROW, USHOE_COUNT)
 
+    0. Make sure that all lines you add are protected with appropriate uconfig guards,
+        such as '#if !UCONFIG_NO_SHOES'.
     1. udbgutil.h:  add  UDBG_UShoeSize to the UDebugEnumType enum before UDBG_ENUM_COUNT
       ( The subsequent steps involve this file, udbgutil.cpp )
     2. Find the marker "Add new enum types above this line"
@@ -184,6 +186,7 @@
 #endif
 
 
+#if UCONFIG_ENABLE_PLUGINS
 #include "unicode/icuplug.h"
 
 #define LEN_UPLUG_REASON 13 /* UPLUG_REASON_ */
@@ -202,6 +205,7 @@
    FIELD_NAME_STR( LEN_UPLUG_LEVEL, UPLUG_LEVEL_LOW ),
    FIELD_NAME_STR( LEN_UPLUG_LEVEL, UPLUG_LEVEL_HIGH ),
 };
+#endif
 
 #define LEN_UDBG 5 /* "UDBG_" */
 static const int32_t count_UDebugEnumType = UDBG_ENUM_COUNT;
@@ -213,8 +217,10 @@
     FIELD_NAME_STR( LEN_UDBG, UDBG_UCalendarMonths ),
     FIELD_NAME_STR( LEN_UDBG, UDBG_UDateFormatStyle ),
 #endif
+#if UCONFIG_ENABLE_PLUGINS
     FIELD_NAME_STR( LEN_UDBG, UDBG_UPlugReason ),
     FIELD_NAME_STR( LEN_UDBG, UDBG_UPlugLevel ),
+#endif
     FIELD_NAME_STR( LEN_UDBG, UDBG_UAcceptResult ),
 #if !UCONFIG_NO_COLLATION
     FIELD_NAME_STR( LEN_UDBG, UDBG_UColAttributeValue ),
@@ -244,8 +250,10 @@
 		COUNT_CASE(UCalendarMonths)
 		COUNT_CASE(UDateFormatStyle)
 #endif
+#if UCONFIG_ENABLE_PLUGINS
         COUNT_CASE(UPlugReason)
         COUNT_CASE(UPlugLevel)
+#endif
         COUNT_CASE(UAcceptResult)
 #if !UCONFIG_NO_COLLATION
         COUNT_CASE(UColAttributeValue)
@@ -264,10 +272,12 @@
 		FIELD_CASE(UCalendarMonths)
 		FIELD_CASE(UDateFormatStyle)
 #endif
+#if UCONFIG_ENABLE_PLUGINS
         FIELD_CASE(UPlugReason)
         FIELD_CASE(UPlugLevel)
+#endif
         FIELD_CASE(UAcceptResult)
-		// FIELD_FAIL_CASE(UNonExistentEnum)
+       // FIELD_FAIL_CASE(UNonExistentEnum)
 #if !UCONFIG_NO_COLLATION
         FIELD_CASE(UColAttributeValue)
 #endif
@@ -319,15 +329,17 @@
         return -1; // type out of range
     }
 	const Field *fields = _udbg_enumFields(type);
-    for(int32_t field = 0;field<_udbg_enumCount(type, FALSE);field++) {
-        if(!strcmp(value, fields[field].str + fields[field].prefix)) {
-            return fields[field].num;
+    if (fields != NULL) {
+        for(int32_t field = 0;field<_udbg_enumCount(type, FALSE);field++) {
+            if(!strcmp(value, fields[field].str + fields[field].prefix)) {
+                return fields[field].num;
+            }
         }
-    }
-    // try with the prefix
-    for(int32_t field = 0;field<_udbg_enumCount(type, FALSE);field++) {
-        if(!strcmp(value, fields[field].str)) {
-            return fields[field].num;
+        // try with the prefix
+        for(int32_t field = 0;field<_udbg_enumCount(type, FALSE);field++) {
+            if(!strcmp(value, fields[field].str)) {
+                return fields[field].num;
+            }
         }
     }
     // fail