[Bug c/81050] ICE with -fexec-charset=utf-16

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81050

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
clang rejects it:
clang-14: error: invalid value 'utf-16' in '-fexec-charset=utf-16'