hg: jdk/sandbox: 8217311: Improve Exception thrown when MulticastSocket.setInterface fails on AIX(Unix)

[chris.hegarty at oracle.com]

Changeset: e1da82072c79
Author:    clanger
Date:      2019-01-18 09:04 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/e1da82072c79

8217311: Improve Exception thrown when MulticastSocket.setInterface fails on AIX(Unix)
Reviewed-by: sgroeger, alanb, mbaesken, chegar

! src/java.base/unix/native/libnet/PlainDatagramSocketImpl.c