kbuild: replace use of strlcpy with a dedicated implmentation in unifdef

static void

keywordedit(const char *replacement)

{

	strlcpy(keyword, replacement, tline + sizeof(tline) - keyword);

	size_t size = tline + sizeof(tline) - keyword;

	char *dst = keyword;

	const char *src = replacement;

	if (size != 0) {

		while ((--size != 0) && (*src != '\0'))

			*dst++ = *src++;

		*dst = '\0';

	}

	print();

}

static void