[Bug target/71777] __builtin_cpu_supports() doesn't work on powerpc

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71777

--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
FYI, this is the output of your demo code on my POWER8 LE Ubuntu 16.04 system:

bergner@ampere:~$ gcc demo.c 
bergner@ampere:~$ ./a.out 
1
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