Move i18n break iterator C++ code to runtime

src/runtime.h

Index: src/runtime.h
diff --git a/src/runtime.h b/src/runtime.h
index 23e91f2ae9e9b64cdf19bd3ce3410e1082508980..d9cd028bed796323e1c3966a9b40c038515ce4d5 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -557,6 +557,14 @@ namespace internal {
   /* Collator. */ \
   F(CreateCollator, 3, 1) \
   F(InternalCompare, 3, 1) \
+  \
+  /* Break iterator. */ \
+  F(CreateBreakIterator, 3, 1) \
+  F(BreakIteratorAdoptText, 2, 1) \
+  F(BreakIteratorFirst, 1, 1) \
+  F(BreakIteratorNext, 1, 1) \
+  F(BreakIteratorCurrent, 1, 1) \
+  F(BreakIteratorBreakType, 1, 1) \
 
 #else
 #define RUNTIME_FUNCTION_LIST_I18N_SUPPORT(F)