[11u] RFR (S) 8212043: AArch64: Add floating-point Math.min/max intrinsics

[Dmitry Chuyko]

Hello,

Original RFE: https://bugs.openjdk.java.net/browse/JDK-8212043
Original post-fix: https://bugs.openjdk.java.net/browse/JDK-8215687

Original patch mostly applies cleanly except macro() additions in 
classes.hpp that were missing surroundings - they are redone manually. 
Initial post-fix for CheckGraalIntrinsics (HotspotTest) Graal test was 
modified to mark new intrinsics as toBeInvestigated in JDK 11+ and this 
change is included in the changeset.

11u webrev: http://cr.openjdk.java.net/~dchuyko/8212043/webrev.11u.00/

Testing: tier1, tier2; compiler/graalunit with Graal on - 
CheckGraalIntrinsics fails because of ECB intrinsics (JDK-8229848, 
jdk11u-jvmci-defer) but not not because of min/max.

--
Thanks,
-Dmitry