[PATCH] config: Remove HAVE_BUILTIN_MEMSET macro

[naohirot@fujitsu.com]

I'll fix the typo

> s patch removed HAVE_BUILTIN_MEMSET macro because GCC 6.2 that is

s/s/This/

> minimum requirement to compile glibc already support
>__builtin_memset()[1].

Thanks.
Naohiro