RFR: JDK-8152691: Compare script broken after Module system

[Tim Bell]

Erik:

> The compare script has several issues after the module system was 
> introduced. I need it to be updated to a clean baseline again. Things 
> fixed in this patch:
>
> * Fixed broken conditional for jar/zip comparison
> * Stop comparing jmods for now, should be redundant enough
> * module-info.class needs to be compared using jdk9 javap output
> * SystemModules.class has a lot of non deterministic ordering of Set 
> members, making it almost always differ. Ideally this should be fixed 
> so that the generator is deterministic, but in the meantime, use some 
> creative sorting to work around it.
> * Updated native binary comparisons with the latest from the 
> build-infra/hotspot work, both for speeding up compares and being more 
> accurate.
>
> With these changes I now have a clean baseline for a full JPRT 
> "buildinfra" build job of two builds with no changes between them.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8152691
> Webrev: http://cr.openjdk.java.net/~erikj/8152691/webrev.root.01

Looks good to me.

/Tim