[Bug c/65377] [5.0 Regression] cpp attribute check ala clang fails to compile

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65377

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Use the proper check if you are want check if you are compiling c++ code first.