Convert tests that parse an Extension value to instead

net/data/parse_certificate_unittest/v3_certificate_template.txt

Index: net/data/parse_certificate_unittest/v3_certificate_template.txt
diff --git a/net/data/parse_certificate_unittest/v3_certificate_template.txt b/net/data/parse_certificate_unittest/v3_certificate_template.txt
index c668ac68fa32c99dbc5fb3517229651950016f1f..50ebd6476befd620dd4c5a8072bcd3d1f0e791ce 100644
--- a/net/data/parse_certificate_unittest/v3_certificate_template.txt
+++ b/net/data/parse_certificate_unittest/v3_certificate_template.txt
@@ -110,6 +110,9 @@ SEQUENCE {
 #-----END BASIC_CONSTRAINTS-----
           }
         }
+#-----BEGIN EXTENSION-----
+# (For adding in another extension at the end of the list)
+#-----END EXTENSION-----
       }
     }
   }