[string] Move String.p.toLowerCase to CSA

src/external-reference-table.cc

Index: src/external-reference-table.cc
diff --git a/src/external-reference-table.cc b/src/external-reference-table.cc
index 276d0ea91ec9a5948aab504660e40cedccb438a1..801f34eb55180701eb5ef9d24960b11e7df3a64d 100644
--- a/src/external-reference-table.cc
+++ b/src/external-reference-table.cc
@@ -250,6 +250,10 @@ void ExternalReferenceTable::AddReferences(Isolate* isolate) {
       "libc_memset");
   Add(ExternalReference::try_internalize_string_function(isolate).address(),
       "try_internalize_string_function");
+  Add(ExternalReference::intl_convert_one_byte_to_lower(isolate).address(),
+      "intl_convert_one_byte_to_lower");
+  Add(ExternalReference::intl_to_latin1_lower_table(isolate).address(),
+      "intl_to_latin1_lower_table");
   Add(ExternalReference::search_string_raw<const uint8_t, const uint8_t>(
           isolate)
           .address(),