git: openjdk/loom: fibers: Fix build

[duke]

Changeset: 0691f1cb
Author:    Ron Pressler <ron.pressler at oracle.com>
Date:      2020-01-07 15:14:54 +0000
URL:       https://git.openjdk.java.net/loom/commit/0691f1cb

Fix build

! src/hotspot/cpu/x86/vm_version_x86.hpp