[Bug target/78263] Compile failure with AltiVec library on PPC64le and -std=c++11 flag

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78263

--- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Patch (finally) submitted here: 
https://gcc.gnu.org/ml/gcc-patches/2019-06/msg00184.html