RFR(s): 8241638: [backport] launcher time metrics always report 1 on Linux when _JAVA_LAUNCHER_DEBUG set

[Liu, Xin]

Hi, Zang, 

I am now a reviewer. I just offer helps to eyeball trivial issues.

The patch is almost a clean backport. As long as you declare the  patch can apply to jdk8u cleanly,  I think you can skip the formal review. 
1. the only difference from original patch is java_md_macosx.m->java_md_macosx.c. I think it's the same file in different names. 
2. I think you should place a whitespace in the copyrights section of java_md_solinux.h.  
"* Copyright (c) 2013,[ ]2020 Oracle and/or its affiliates. All rights reserved."

Thanks,
--lx

On 4/22/20, 10:56 PM, "jdk8u-dev on behalf of linzang(臧琳)" <jdk8u-dev-bounces at openjdk.java.net on behalf of linzang at tencent.com> wrote:

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    Dear All,
         May I ask your help to review the tiny patch about backport of 8241638?
         Issue: https://bugs.openjdk.java.net/browse/JDK-8241638
         Patch: http://cr.openjdk.java.net/~lzang/8241638/8u/webrev01/

    BRs,
    Lin