hg: panama/dev: Fix AArch64 build failure and jtreg long64/double64 failures for AArch64 NEON

[vladimir.x.ivanov at oracle.com]

Changeset: 5e27e0d2b863
Author:    yzhang
Date:      2018-10-26 14:27 +0800
URL:       http://hg.openjdk.java.net/panama/dev/rev/5e27e0d2b863

Fix AArch64 build failure and jtreg long64/double64 failures for AArch64 NEON
Summary: add vector_size_supported check for long64/double64.

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