[Bug preprocessor/101488] Implement p1042r1 __VA_OPT__ placemarker changes

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101488

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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          Component|c++                         |preprocessor
   Target Milestone|---                         |12.0