[MERGE #2668 @dilijev] Disabling flaky test/es6/proto_disable.js. See #2667.
[MERGE #2668 @dilijev] Disabling flaky test/es6/proto_disable.js. See #2667.

Merge pull request #2668 from dilijev:disable-flaky-test

See #2667

Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore