Bugzilla bug 228907: added a stub implementation for the obsolete native

function Java_org_mozilla_jss_pkcs11_PK11Cert_getNickname, which is listed
in the symbol export file jss.def.

security/jss/org/mozilla/jss/pkcs11/PK11Cert.c

@@ -592,6 +592,18 @@ finish:
     return byteArray;
 }
 
+/**********************************************************************
+ * This is what used to be PK11Cert.getNickname.  Kept merely to
+ * satisfy the symbol export file jss.def.
+ */
+JNIEXPORT jstring JNICALL
+Java_org_mozilla_jss_pkcs11_PK11Cert_getNickname
+    (JNIEnv *env, jobject this)
+{
+    PR_NOT_REACHED("a stub function");
+    return NULL;
+}
+
 /**********************************************************************
  * PK11Cert.setTrust
  */