Fix intl builtins in IsIsolateIndependent predicate

Intl builtins must stay behind V8_INTL_SUPPORT.

This fixes:
ci.chromium.org/buildbot/client.v8.ports/V8%20Mips%20-%20builder/16733

TBR=yangguo@chromium.org

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6666
Change-Id: I001df26585e376c6e242ece88612e10417529037
Reviewed-on: https://chromium-review.googlesource.com/1030272Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52811}

src/builtins/builtins.cc

@@ -926,7 +926,6 @@ bool Builtins::IsIsolateIndependent(int index) {
     case kStringPrototypeLocaleCompare:
     case kStringPrototypeMatch:
     case kStringPrototypeMatchAll:
-    case kStringPrototypeNormalizeIntl:
     case kStringPrototypePadEnd:
     case kStringPrototypePadStart:
     case kStringPrototypeRepeat:
@@ -942,7 +941,6 @@ bool Builtins::IsIsolateIndependent(int index) {
     case kStringPrototypeSubstring:
     case kStringPrototypeSup:
     case kStringPrototypeToString:
-    case kStringPrototypeToUpperCaseIntl:
     case kStringPrototypeTrim:
     case kStringPrototypeTrimEnd:
     case kStringPrototypeTrimStart:
@@ -1025,7 +1023,9 @@ bool Builtins::IsIsolateIndependent(int index) {
     case kWeakSetPrototypeAdd:
     case kWeakSetPrototypeDelete:
 #ifdef V8_INTL_SUPPORT
+    case kStringPrototypeNormalizeIntl:
     case kStringPrototypeToLowerCaseIntl:
+    case kStringPrototypeToUpperCaseIntl:
     case kStringToLowerCaseIntl:
 #endif
       return true;