Port contrib/netbsd-tests/fs/tmpfs/h_tools.c to FreeBSD

- Add inttypes.h #include for PRId64 macro
- Use FreeBSD's copy of getfh(2), which doesn't include a `fh_size` parameter.
  Use sizeof(fhandle_t) instead as the size of fhp is always fixed as
  fhandle_t, unlike NetBSD's copy of fhp, which is void*.

MFC after:	2 weeks
Sponsored by:	EMC / Isilon Storage Division

contrib/netbsd-tests/fs/tmpfs/h_tools.c

@@ -50,6 +50,10 @@
 #include <string.h>
 #include <unistd.h>
 
+#ifdef __FreeBSD__
+#include <inttypes.h>
+#endif
+
 /* --------------------------------------------------------------------- */
 
 static int getfh_main(int, char **);
@@ -70,7 +74,12 @@ getfh_main(int argc, char **argv)
 	if (argc < 2)
 		return EXIT_FAILURE;
 
+#ifdef __FreeBSD__
+	fh_size = sizeof(fhandle_t);
+#else
 	fh_size = 0;
+#endif
+
 	fh = NULL;
 	for (;;) {
 		if (fh_size) {
@@ -85,7 +94,11 @@ getfh_main(int argc, char **argv)
 		 * but it may change if someone moves things around,
 		 * so retry untill we have enough memory.
 		 */
+#ifdef __FreeBSD__
+		error = getfh(argv[1], fh);
+#else
 		error = getfh(argv[1], fh, &fh_size);
+#endif
 		if (error == 0) {
 			break;
 		} else {