V8 has changed the flag used for Intl Locale Info proposal.

Author: iamstolis

graal-js/src/com.oracle.truffle.js.test.external/src/com/oracle/truffle/js/test/external/testv8/TestV8Runnable.java

@@ -111,7 +111,7 @@ public class TestV8Runnable extends TestRunnable {
     private static final Set<String> STAGING_FLAGS = featureSet(new String[]{
                     "--harmony-array-grouping",
                     "--harmony-atomics-waitasync",
-                    "--harmony-intl-locale_info",
+                    "--harmony-intl-locale-info-func",
                     "--harmony-shadow-realm",
                     "--harmony-weak-refs-with-cleanup-some",
                     "--js-promise-withresolvers",