RFR: JDK-8173476: Provide lldb from devkit when running tests on macosx

[Tim Bell]

Erik:

> When running tests on Macosx, the failurehandle will attempt to use lldb
> to create dumps on timeouts. This logic requires an lldb that isn't too
> old. In our lab we have several instances of too old lldb on the
> machines. To fix this, we can add lldb from the devkit to the path when
> running tests, through Jib.
>
> The patch also corrects the path added by the bootjdk to actually add
> the bin dir on not the JAVA_HOME dir.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8173476
>
> Webrev: http://cr.openjdk.java.net/~erikj/8173476/webrev.01/

Looks good.  Thanks for fixing this.

/Tim