Add references to CWE-454 (External Initialization of Trusted Variables)

Author: egregius313

java/ql/src/Security/CWE/CWE-078/ExecTaintedEnvironment.qhelp

@@ -34,6 +34,9 @@ safe before using it.</p>
 <sample src="ExecTaintedEnvironmentChecked.java" />
 </example>
 <references>
+  <li>
+    MITRE: <a href="https://cwe.mitre.org/data/definitions/454.html">CWE-454: External Initialization of Trusted Variables or Data Stores</a>.
+  </li>
   <li>
     The Java Tutorials: <a href="https://docs.oracle.com/javase/tutorial/essential/environment/env.html">, Environment Variables</a>.
   </li>

java/ql/src/Security/CWE/CWE-078/ExecTaintedEnvironment.ql

@@ -11,6 +11,7 @@
  * @tags security
  *    external/cwe/cwe-078
  *    external/cwe/cwe-088
+ *    external/cwe/cwe-454
  */
 
 import java