[Patch] Use memcpy instead of strncpy in nscd/nscd.h to fix build problem with ToT GCC

[Joseph Myers]

On Tue, 12 Dec 2017, Steve Ellcey wrote:

> The latest ToT GCC is warning about the use of strncpy in nscd/nscd.h.
> The strncpy is intentionally truncating a string so the warning is not
> really useful in this instance.  Joseph suggested changing it to
> a memcpy and that seems to work fine.  I built glibc with ToT GCC
> using this patch and ran the glibc test with no regressions on aarch64.
> 
> OK to checkin?

OK.

-- 
Joseph S. Myers
joseph@codesourcery.com