[Bug libstdc++/127690] Problems with pb_ds sources

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127690

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And all the headers use .hpp extensions which is also inconsistent with the
rest of the library.