hg: loom/loom: Fix current thread issue in RegisterMap::RegisterMap().

[chris.plummer at oracle.com]

Changeset: ae8653279aa7
Author:    cjplummer
Date:      2019-02-07 13:12 -0800
URL:       http://hg.openjdk.java.net/loom/loom/rev/ae8653279aa7

Fix current thread issue in RegisterMap::RegisterMap().

! src/hotspot/share/runtime/frame.cpp