Add tests for mbedtls_cipher_crypt API

1. Add tests for 'mbedtls_cipher_crypt()' API
2. Resolves #1091, by ignoring IV when the cipher mode is MBEDTLS_MODE_ECB
diff --git a/ChangeLog b/ChangeLog
index be0026e..36c5824 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 mbed TLS ChangeLog (Sorted per branch, date)
 
+= mbed TLS x.x.x branch released xxxx-xx-xx
+
+Bugfix
+   * Ignore iv in mbedtls_cipher_set_iv() when the cipher mode is MBEDTLS_MODE_ECB
+     Fix for #1091 raised by ezdevelop
+
 = mbed TLS 2.7.4 branch released 2018-06-18
 
 Bugfix