[Bug libstdc++/60936] [4.9/5/6/7 Regression] Binary code bloat with std::string

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60936

--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
For the record, I tried this and didn't see any change in code size, so didn't
commit anything.