[urgent] RFR: JDK-8189679: JDK-8189094 broke testing in Mach 5

[Tim Bell]

Erik:

> In the change for JDK-8189094 I accidentally broke testing in Mach 5.
> The problem is in jib-profiles.js where the definition of boot_jdk_home
> is no longer defined globally in the common object, and because of this,
> JT_JAVA does not get a good value in the run-test* profiles.
>
> This patch restores common.boot_jdk_home and common.boot_jdk_version.
> Testing is under way.
>
> Webrev: http://cr.openjdk.java.net/~erikj/8189679/webrev.01/
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8189679

Looks good to me.

/Tim