Import mbedtls-2.16.5

Imports Mbed TLS 2.16.5 from https://github.com/ARMmbed/mbedtls.git
commit 0fce215851cc ("Merge pull request #3053 from
yanesca/bump-version-2.16.5") (tag mbedtls-2.16.5).

Certain files will bever be needed and are thus removed:
 rm -f .gitignore .globalrc .pylintrc .travis.yml
 rm -f CMakeLists.txt DartConfiguration.tcl Makefile
 rm -f include/{.gitignore,CMakeLists.txt}
 rm -f library/{.gitignore,CMakeLists.txt,Makefile}
 rm -rf .git .github configs docs doxygen programs scripts tests visualc

This is a complete overwrite of previous code so earlier changes in the
branch import/mbedtls-2.16.0 will be added on top of this commit to bring
the changes forward.

Signed-off-by: Jerome Forissier <jerome@forissier.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/lib/libmbedtls/mbedtls/library/poly1305.c b/lib/libmbedtls/mbedtls/library/poly1305.c
index a04e752..2b56c5f 100644
--- a/lib/libmbedtls/mbedtls/library/poly1305.c
+++ b/lib/libmbedtls/mbedtls/library/poly1305.c
@@ -1,10 +1,10 @@
-/*  SPDX-License-Identifier: Apache-2.0 */
 /**
  * \file poly1305.c
  *
  * \brief Poly1305 authentication algorithm.
  *
  *  Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
  *
  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
  *  not use this file except in compliance with the License.
@@ -58,10 +58,10 @@
 #define POLY1305_BLOCK_SIZE_BYTES ( 16U )
 
 #define BYTES_TO_U32_LE( data, offset )                           \
-    ( (uint32_t) data[offset]                                     \
-          | (uint32_t) ( (uint32_t) data[( offset ) + 1] << 8 )   \
-          | (uint32_t) ( (uint32_t) data[( offset ) + 2] << 16 )  \
-          | (uint32_t) ( (uint32_t) data[( offset ) + 3] << 24 )  \
+    ( (uint32_t) (data)[offset]                                     \
+          | (uint32_t) ( (uint32_t) (data)[( offset ) + 1] << 8 )   \
+          | (uint32_t) ( (uint32_t) (data)[( offset ) + 2] << 16 )  \
+          | (uint32_t) ( (uint32_t) (data)[( offset ) + 3] << 24 )  \
     )
 
 /*