[Bug go/66870] split stack issues on ppc64le and ppc64

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66870

--- Comment #18 from Ian Lance Taylor <ian at airs dot com> ---
In the patch in comment #17, the code in gcc/configure.ac looks misplaced:
shouldn't it be before the ";;", and not add another ";;"?

Can you explain why the test in libgo/configure.ac will fail for a linker that
does not support split-stack?  I'm not quite seeing it.  I haven't tried it,
though.