Summary:
Hoop up EarlyJsErrorHandler so we could pass js error data to object-c to report.
Changelog:
[iOS][Chagned] - Add function to report early js errors
Reviewed By: RSNara
Differential Revision: D34096343
fbshipit-source-id: fdbc6ea5d1f3cc6ab55fcd22b48bbe8fb1f1ca8f