ci: handle EBUSY for udp #706
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I have checked
libuv/src/unix/udp.candlibuv/src/unix/darwin.c, can't point out the immediate cause ofEBUSYwhen calluv_udp_set_source_membership.I have check open, bind, setsockopt,..., the return code not mention
EBUSY.I checked https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/intro.2.html get some thing about EBUSY. That means Resource busy. An attempt to use a system resource which was in use at the time in a manner which would have conflicted with the request. So we do some retry should be safe and can fix and close #704.