RFR: 8219366: AARCH64: String inflate intrinsic documentation and maintenance improvement

[Dmitrij Pochepko]

Hi all,

Please review patch for 8219366: AARCH64: String inflate intrinsic 
documentation and maintenance improvement
webrev: http://cr.openjdk.java.net/~dpochepk/8219366/webrev.01/

Patch includes:
- documentation
- new jtreg test
- label names are now uppercase

Since no code was changed, only sanity tests were executed (hotspot 
jtreg compiler/* including new test).
No regressions found.

I'd like to thank Pengfei Li for help in pre-review.

CR: https://bugs.openjdk.java.net/browse/JDK-8219366

Thanks,
Dmitrij