[11u] RFR 8206895: aarch64: rework error-prone cmp instuction

[Dmitry Chuyko]

Hello,

Original bug: https://bugs.openjdk.java.net/browse/JDK-8206895

Original patch applies with minor fuzz and requires minor adjustments: 
few rejected changes in macroAssembler_aarch64.cpp and 
stubGenerator_aarch64.cpp were recreated -- all because of already 
ported stuff [1][2][3][4].

11u webrev: http://cr.openjdk.java.net/~dchuyko/8206895/webrev.11u.00/

Testing: tier1, tier2.

[1] https://bugs.openjdk.java.net/browse/JDK-8239787
[2] https://bugs.openjdk.java.net/browse/JDK-8228400
[3] https://bugs.openjdk.java.net/browse/JDK-8205421
[4] https://bugs.openjdk.java.net/browse/JDK-8218966

--
Thanks,
-Dmitry