hg: jdk/sandbox: 8223779: Build failure after 8223040 (Add a AsyncGetCallTrace test)

[chris.hegarty at oracle.com]

Changeset: 6a60270af76b
Author:    jcbeyler
Date:      2019-05-13 20:45 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/6a60270af76b

8223779: Build failure after 8223040 (Add a AsyncGetCallTrace test)
Summary: Fix a build flag for the AGCT test
Reviewed-by: cjplummer, sspitsyn

! make/test/JtregNativeHotspot.gmk