libvpx: Pull from upstream

source/libvpx/third_party/nestegg/halloc/halloc.h

-/*
- *      Copyright (c) 2004-2010 Alex Pankratov. All rights reserved.
- *
- *      Hierarchical memory allocator, 1.2.1
- *      http://swapped.cc/halloc
- */
-
-/*
- *      The program is distributed under terms of BSD license. 
- *      You can obtain the copy of the license by visiting:
- *      
- *      http://www.opensource.org/licenses/bsd-license.php
- */
-
-#ifndef _LIBP_HALLOC_H_
-#define _LIBP_HALLOC_H_
-
-#include <stddef.h>  /* size_t */
-
-/*
- *      Core API
- */
-void * halloc (void * block, size_t len);
-void   hattach(void * block, void * parent);
-
-/*
- *      standard malloc/free api
- */
-void * h_malloc (size_t len);
-void * h_calloc (size_t n, size_t len);
-void * h_realloc(void * p, size_t len);
-void   h_free   (void * p);
-char * h_strdup (const char * str);
-
-/*
- *      the underlying allocator
- */
-typedef void * (* realloc_t)(void * ptr, size_t len);
-
-extern realloc_t halloc_allocator;
-
-#endif
-