[Bug bootstrap/77569] [7 Regression] self tests fail when not using C locale

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77569

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 40446
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40446&action=edit
gcc7-pr77569.patch

Untested fix that implements the verification - if that message has been
translated, the self-test will still work, but will not catch ebcdic handling
bugs the same as when it is not translated.