RFR: JDK-8073965: Bring compare.sh up to date with JDK 9

[Tim Bell]

Erik:

> The build compare script, which was developed for the build-infra 
> makefile rewrite project, has been unmaintained for a while. I would 
> like to bring it to a basic usable level with current JDK 9 (as I need 
> to use it quite a lot these days). This includes various minor fixes 
> and adjustments, mostly to the exception code. Some of the changes are:
>
> * Remove 32bit solaris exceptions
> * Update exception file listings with added and removed filed from the 
> images, including the removal of the jre dir in the jdk image.
> * Rename variables and working dirs from j2sdk to jdk and j2re to jre.
> * Update sed expressions used to filter certain comparisons to adapt 
> to the output of new compiler and OS versions.
>
> I have run these changes on all Oracle official platforms and at least 
> for me, the comparisons are now clean for reasonably equal builds. 
> Further improvements are likely to be needed though.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8073965
> Webrev: http://cr.openjdk.java.net/~erikj/8073965/webrev.01/

Looks good to me.

/Tim