Add ChangeLog entry for memory leak fix

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/ChangeLog.d/fix_x509_get_name_mem_leak.txt b/ChangeLog.d/fix_x509_get_name_mem_leak.txt
new file mode 100644
index 0000000..358d1af
--- /dev/null
+++ b/ChangeLog.d/fix_x509_get_name_mem_leak.txt
@@ -0,0 +1,4 @@
+Bugfix
+    * Fix memory leak in ssl_parse_certificate_request() caused by
+      mbedtls_x509_get_name() not freeing allocated objects in case of error.
+      Change mbedtls_x509_get_name() to clean up allocated objects on error.