RFR: 165673: AArch64: Fix JNI floating point argument handling

[Andrew Dinn]

> Good. Consider me reviewed test changes.
> 
> Please, prepare webrev and changeset on cr.openjdk.java.net.
> 
> Ningsheng Jian is not Author in OpenJDK, should be listed as  Contributed-by:
> 
> Thanks,
> Vladimir

Oops, apologies -- rather than upload the webrev I actually pushed this
change to hs-comp. I hope that is alright.

regards,


Andrew Dinn
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Senior Principal Software Engineer
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