git: openjdk/jdk16u: 8259392: Zero error reporting is broken after JDK-8255711

[Aleksey Shipilev]

Changeset: bb285ce5
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2021-03-02 15:39:53 +0000
URL:       https://git.openjdk.java.net/jdk16u/commit/bb285ce5

8259392: Zero error reporting is broken after JDK-8255711

Backport-of: bb247b02c82b5b74a3b3a1ce76075e5d109829e1

! src/hotspot/os/posix/signals_posix.cpp