RFR: 8221639: [x32] expand_exec_shield_cs_limit workaround is undefined code after JDK-8199717

[John Paul Adrian Glaubitz]

> On Apr 29, 2019, at 8:20 PM, Andrew John Hughes <gnu.andrew at redhat.com> wrote:
> 
> I don't believe OpenJDK has support for x32. At least, we've had a
> ticket for it for a long time and I've never had the time to look at
> getting even Zero to build on such a platform:

We’re building Zero on x32 in Debian, so I think the bug report title should be changed to avoid confusion.

I did actually add basic build support for x32 for Zero at some point.

Adrian