PolarSSL: update to current stable version (1.3.4)

I just removed Externals/polarssl/, added the new version, then deleted
the following files/directories:

DartConfiguration.tcl
Makefile
doxygen/
library/Makefile
programs/
scripts/
tests/
visualc/

Externals/polarssl/library/memory.c

@@ -0,0 +1,63 @@
+/*
+ *  Memory allocation layer
+ *
+ *  Copyright (C) 2006-2013, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "polarssl/config.h"
+
+#if defined(POLARSSL_MEMORY_C)
+
+#include "polarssl/memory.h"
+
+#if !defined(POLARSSL_MEMORY_STDMALLOC)
+static void *memory_malloc_uninit( size_t len )
+{
+    ((void) len);
+    return( NULL );
+}
+
+#define POLARSSL_MEMORY_STDMALLOC   memory_malloc_uninit
+#endif /* !POLARSSL_MEMORY_STDMALLOC */
+
+#if !defined(POLARSSL_MEMORY_STDFREE)
+static void memory_free_uninit( void *ptr )
+{
+    ((void) ptr);
+}
+
+#define POLARSSL_MEMORY_STDFREE     memory_free_uninit
+#endif /* !POLARSSL_MEMORY_STDFREE */
+
+void * (*polarssl_malloc)( size_t ) = POLARSSL_MEMORY_STDMALLOC;
+void (*polarssl_free)( void * )     = POLARSSL_MEMORY_STDFREE;
+
+int memory_set_own( void * (*malloc_func)( size_t ),
+                    void (*free_func)( void * ) )
+{
+    polarssl_malloc = malloc_func;
+    polarssl_free = free_func;
+
+    return( 0 );
+}
+
+#endif /* POLARSSL_MEMORY_C */