deps: patch V8 to 7.4.288.21
Refs: https://github.com/v8/v8/compare/7.4.288.18...7.4.288.21
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Refs: https://github.com/v8/v8/compare/7.4.288.18...7.4.288.21
make -j4 test
(UNIX), or vcbuild test
(Windows) passes