RFR: 8256614: AArch64: Add SVE backend implementation for integer min/max

[Xiaohong Gong]

Currently the Arm SVE implementation for integer (byte,short,int,long) vector min/max is missing. This is needed for VectorAPI. We need to add them all to avoid the "bad AD file".

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Commit messages:
 - 8256614: AArch64: Add SVE backend implementation for integer min/max

Changes: https://git.openjdk.java.net/jdk/pull/1337/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1337&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256614
  Stats: 135 lines in 3 files changed: 76 ins; 31 del; 28 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1337.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1337/head:pull/1337

PR: https://git.openjdk.java.net/jdk/pull/1337