hg: panama/dev: Implement Vector API abs and not for AArch64 NEON

[vladimir.x.ivanov at oracle.com]

Changeset: ae8a17841a0c
Author:    yzhang
Date:      2018-10-29 15:52 +0800
URL:       http://hg.openjdk.java.net/panama/dev/rev/ae8a17841a0c

Implement Vector API abs and not for AArch64 NEON
Add vabs8B/16B/4S/8S/2I/4I/2L and vnot8b/16B instructions to AArch64 backend
to implement Vector API abs() and not().

! src/hotspot/cpu/aarch64/aarch64.ad