Make libnosys function stubs part of libnacl

src/untrusted/nosys/popen.c

Index: src/untrusted/nosys/popen.c
diff --git a/src/untrusted/nosys/popen.c b/src/untrusted/nosys/popen.c
deleted file mode 100644
index 8083bbf2e71fe490439ad5de68c8d46632690a8f..0000000000000000000000000000000000000000
--- a/src/untrusted/nosys/popen.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (c) 2011 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 `popen' for porting support.
- */
-
-#include <stdio.h>
-#include <errno.h>
-
-FILE *popen(const char *command, const char *modes) {
-  errno = ENOSYS;
-  return NULL;
-}
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(popen);