[Bug testsuite/78133] Commit r241489 adds printf specifiers not supported by newlib.

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78133

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
This is still on my list of things to take care of before the release but I
haven't had a chance to work on it yet.  Sorry about that.  I think the minimum
safe solution is to xfail the tests for the target.  Ultimately, if it doesn't
yet, GCC should probably be enhanced to warn on %a with -Wformat, and
-Wformat-length should treat %a the same as newlib (as an ordinary string
perhaps?)