[Bug libstdc++/119266] libstdc++.modules.json has wrong path

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119266

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah no, because we're just using it from the makefile, not in C++ code.