[Intl] Ship BigInt toLocaleString support.

Bug: v8:8699
Change-Id: I4e1f82132c3e48c21295ea7b0f3bcd24d5bd3c54
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1575019Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60929}

src/flag-definitions.h

@@ -234,7 +234,6 @@ DEFINE_IMPLICATION(harmony_private_methods, harmony_private_fields)
 #ifdef V8_INTL_SUPPORT
 #define HARMONY_STAGED(V)                                                  \
   HARMONY_STAGED_BASE(V)                                                   \
-  V(harmony_intl_bigint, "BigInt.prototype.toLocaleString")                \
   V(harmony_intl_segmenter, "Intl.Segmenter")
 #else
 #define HARMONY_STAGED(V) HARMONY_STAGED_BASE(V)
@@ -261,6 +260,7 @@ DEFINE_IMPLICATION(harmony_private_methods, harmony_private_fields)
 #ifdef V8_INTL_SUPPORT
 #define HARMONY_SHIPPING(V)                                                \
   HARMONY_SHIPPING_BASE(V)                                                 \
+  V(harmony_intl_bigint, "BigInt.prototype.toLocaleString")                \
   V(harmony_intl_datetime_style, "dateStyle timeStyle for DateTimeFormat") \
   V(harmony_locale, "Intl.Locale")
 #else