RFR(S): 8190781: ppc64 + s390: Fix CriticalJNINatives

[Doerr, Martin]

Hi,

CriticalJNINatives are currently not working correctly on PPC64 and s390. Code which saves & restores int type values is missing.
The s390 implementation needs 2 more minor fixes. Please see my webrev:
http://cr.openjdk.java.net/~mdoerr/8190781_ppc64_s390_CritNatives/webrev.00/

I've also fixed an obvious copy&paste bug in PPC64 assembler in a currently unused instruction.
My proposed change also switches off SuperwordUseVSX on PPC64 as discussed with Michihiro who is still working on it.

Please review.

Best regards,
Martin

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