<memory.h> isn't actually an official standard C header.
memcpy() is defined in <string.h> / <cstring>.

Change-Id: I578e3a8ea741934e594049e359b906665de80134
Reviewed-on: https://swiftshader-review.googlesource.com/c/22649Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>