[Bug libstdc++/100427] canadian compile for mingw-w64 copies the wrong dlls for mingw-w64 multilibs

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100427

--- Comment #5 from cqwrteur <unlvsur at live dot com> ---
actually a lot of dlls are not copied correctly.

libstdc++-6.dll libatomic.dll libquadmath.dll libssp.dll are all copied with 32
bit dlls.

And libgcc_seh.dll is not copied.

I think the copy to bin behavior should be removed. It should be just like
normal linux distribution. 64 bit dlls in lib. 32 bit dlls in lib32.