RFR: Add s390(x) detection to platform.m4

[Magnus Ihse Bursie]

On 2013-09-04 21:26, Omair Majid wrote:
> Over in Fedora-land, we are trying to build OpenJDK (using zero) on
> s390(x) [1]. One of the changes needed is updating the platform.m4 file
> to teach it about s390(x). The following webrev does that:
> http://cr.openjdk.java.net/~omajid/webrevs/s390-platform/00/
>
> The patch was written by Dan Horák <dan at danny.cz> (who works for Red Hat
> and is covered by the CLA).

My only concern here is about

VAR_CPU_ARCH=s390x

While I'm not 100% familiar about the specifics of the s390 family, nor 
the s390 port, the general idea behind the VAR_CPU_ARCH variable, as 
opposed to the VAR_CPU variable, is to unify 32 and 64 bit versions of 
the same CPU.

/Magnus