Provide IRT process interface

src/untrusted/nacl/stubs/waitpid.c

Index: src/untrusted/nacl/stubs/waitpid.c
diff --git a/src/untrusted/nacl/stubs/waitpid.c b/src/untrusted/nacl/stubs/waitpid.c
deleted file mode 100644
index 0057f2066495ce250f0bb7bf7f6ec79544968e79..0000000000000000000000000000000000000000
--- a/src/untrusted/nacl/stubs/waitpid.c
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright 2010 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can
- * be found in the LICENSE file.
- */
-
-
-/*
- * Stub routine for `waitpid' for porting support.
- */
-
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <errno.h>
-
-pid_t waitpid(pid_t pid, int *status, int options) {
-  errno = ENOSYS;
-  return -1;
-}