aarch + PATH + slim-build.sh fixes

[dinogun]

1. Fix aarch docker image (pick latest tarball for multiple builds).
2. Fix PATH for all builds.
3. Update the slim-build.sh to the correct one !

[dinogun]

Looks like I checked-in the wrong version of slim-build.sh in the previous PR. This PR updates that to the right file and a few other minor updates. Am testing this on all platforms. Will remove WIP once they go through fine.

[tellison]

FYI in case you missed it...
http://openjdk.java.net/jeps/336

[dinogun]

This should only be run for Java 8 binaries

[tellison]

This looks good. I wonder if the stripping logic should more naturally form part of the build script logic than the Docker preparation? I can imagine that we'd be interested in this for a wide variety of distribution formats. Over time perhaps we'd consider moving it over there.

[karianna]

@tellison We actually discussed that in the build meeting and @dinogun has a plan for that yes.

[dinogun]

@tellison That is the plan. Please also look at the original slim build PR #29 where I've said the same thing. In addition to getting this as part of the build scripts, we also need to get the headless TCK testing in place as well.

[dinogun]

Removing WIP as I've tested this. However I did see an issue with nightly sum mismatch in x64 builds in 1 out of 5 tests. That looks like a separate problem (with how the "latest" tag is associated). Will open a separate issue for that at the build repo. Please review, thanks

[dinogun]

@tellison @karianna Please review. My test builds with the above changes are going through fine.

[karianna]

LGTM