RFR: JDK-8223335: Compare baseline builds on linux are failing

[Tim Bell]

Erik:

> ... A call to configure from make
> requires a cd to CONFIGURE_START_DIR first.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8223335
>
> Webrev: http://cr.openjdk.java.net/~erikj/8223335/webrev.01

Looks good.

Tim