Add link hook to `package:intl4x` #717

Job	Run time
health / changelog / run changelog health check	39s
health / breaking / run breaking health check	48s
health / do-not-submit / run do-not-submit health check	43s
health / coverage / run coverage health check	43s
health / leaking / run leaking health check	54s
health / license / run license health check	57s
health / version / run version health check	31s
health / comment	4s
	5m 19s

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