[Bug testsuite/95577] Tcl error with testsuite/gcc.misc-tests/outputs.exp on darwin

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95577

--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Proposed fix at 
> https://gcc.gnu.org/pipermail/gcc-patches/2020-June/548730.html

Seems to work for me. Thanks!