Update change log
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= mbed TLS x.x.x branch released xxxx-xx-xx
+Security
+ * Fix a potential memory leak in mbedtls_ssl_setup( ) function. An allocation
+ failure could leave an unreleased buffer. A handshake init failure would
+ lead to leaving two unreleased buffers.
+
Features
* Add new crypto primitives from RFC 7539: stream cipher Chacha20, one-time
authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed by