Reland "[Intl] Ship Intl.Locale"

This is a reland of f1b21a10

Original change's description:
> [Intl] Ship Intl.Locale
> 
> Bug: v8:7684
> Change-Id: I5994c3fc4b97c4322c4e0cf20305da75e66efd5a
> Reviewed-on: https://chromium-review.googlesource.com/c/1478220
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> Commit-Queue: Frank Tang <ftang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59780}

Bug: v8:7684
Change-Id: I4f73205398a9649e2f55a1b090cd3afffade68c4
Reviewed-on: https://chromium-review.googlesource.com/c/1480918Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59845}

src/flag-definitions.h

@@ -220,7 +220,6 @@ DEFINE_IMPLICATION(harmony_private_methods, harmony_private_fields)
 #ifdef V8_INTL_SUPPORT
 #define HARMONY_STAGED(V)          \
   HARMONY_STAGED_BASE(V)           \
-  V(harmony_locale, "Intl.Locale") \
   V(harmony_intl_segmenter, "Intl.Segmenter")
 #else
 #define HARMONY_STAGED(V) HARMONY_STAGED_BASE(V)
@@ -243,7 +242,9 @@ DEFINE_IMPLICATION(harmony_private_methods, harmony_private_fields)
   V(harmony_private_fields, "harmony private fields in class literals")
 
 #ifdef V8_INTL_SUPPORT
-#define HARMONY_SHIPPING(V) HARMONY_SHIPPING_BASE(V)
+#define HARMONY_SHIPPING(V) \
+  HARMONY_SHIPPING_BASE(V)  \
+  V(harmony_locale, "Intl.Locale")
 #else
 #define HARMONY_SHIPPING(V) HARMONY_SHIPPING_BASE(V)
 #endif