hg: panama/dev: [vector] Address review comments for AArch64 backend changes

[yang.zhang at arm.com]

Changeset: 7989ac6b413b
Author:    yzhang
Date:      2020-07-07 11:47 +0800
URL:       https://hg.openjdk.java.net/panama/dev/rev/7989ac6b413b

[vector] Address review comments for AArch64 backend changes
1. Seperate newly added NEON instructions to a new ad file
   aarch64_neon.ad
2. Add assembler tests for NEON instructions. Trailing spaces
   in the python script are also removed.

! make/hotspot/gensrc/GensrcAdlc.gmk
! src/hotspot/cpu/aarch64/aarch64-asmtest.py
! src/hotspot/cpu/aarch64/aarch64.ad
+ src/hotspot/cpu/aarch64/aarch64_neon.ad
! src/hotspot/cpu/aarch64/aarch64_neon_ad.m4
! src/hotspot/cpu/aarch64/assembler_aarch64.cpp