[Bug go/64999] s390x libgo test failure in TestMemoryProfiler

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64999

--- Comment #34 from Ian Lance Taylor <ian at airs dot com> ---
You're right, we could just change runtime_callers.  Or, simpler still, just
change callback in libgo/runtime/go-callers.c.  Good point.