[tlbuild] icu-65.1 in TL and -lpthread

[Karl Berry]

    It's probably not "them" making it easy or difficult to log in,

It is "them" making a choice of what bug tracking system to use.
E.g., they could just use github issues.

    I tried logging in with a google account and opened
        https://unicode-org.atlassian.net/browse/ICU-20935

Thanks. Hope someone there cares about it. -k