WebKit JSC reifyStaticProperty Attribute Flag Issue

WebKit: JSC: reifyStaticProperty needs to set the PropertyAttribute::CustomAccessor flag for CustomGetterSetter CVE-2019-6215 https://github.com/WebKit/webkit/blob/3fff8c40c665a09de5e3ede46fc35908f69353c3/Source/JavaScriptCore/runtime/Lookup.hL392 if value.attributes &...