RFR: JDK-8230652: Improve verbose output

[Alexander Zuev]

On Sat, 12 Sep 2020 18:30:08 GMT, Andy Herrick <herrick at openjdk.org> wrote:

> JDK-8230652
> Extracting the commands displayed by verbose output (including commands called thru ToolProvider) , to contain the the
> command, it's output, and it's return value on separate lines and formatted in a way that they can be easily cut and
> pasted into a script.

Looks good.

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Marked as reviewed by azuev-java at github.com (no known OpenJDK username).

PR: https://git.openjdk.java.net/jdk/pull/141