[Bug c++/69523] -Wliteral-suffix should not warn within namespace std

[eric at efcs dot ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69523

--- Comment #5 from Eric Fiselier <eric at efcs dot ca> ---
Would it be possible to add a -Wno-literal-suffix flag? I really want to use
warning with GCC, but I need to disable this one.