hg: jdk/sandbox: 8231457: Asserts on AIX because os::elapsed_counter() is not monotonic

[chris.hegarty at oracle.com]

Changeset: 4107e5a422b6
Author:    azeller
Date:      2019-09-28 17:52 -0400
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/4107e5a422b6

8231457: Asserts on AIX because os::elapsed_counter() is not monotonic
Summary: replace gettimeofday with javaTimeNanos
Reviewed-by: dholmes, stuefe

! src/hotspot/os/aix/os_aix.cpp