hg: jdk/sandbox: 8223309: test failing due to self-assign-overloaded

[chris.hegarty at oracle.com]

Changeset: 297ddf282627
Author:    erikj
Date:      2019-05-03 09:34 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/297ddf282627

8223309: test failing due to self-assign-overloaded
Reviewed-by: tbell
Contributed-by: johan.vos at gluonhq.com, erik.joelsson at oracle.com

! make/autoconf/flags-cflags.m4
! make/hotspot/lib/CompileGtest.gmk