[Bug c++/90569] __STDCPP_DEFAULT_NEW_ALIGNMENT__ is wrong for i386-pc-solaris2.11

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90569

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The glibc change was https://sourceware.org/bugzilla/show_bug.cgi?id=21120 and
is present from version 2.26