ldgen: generate ld files with fixed order of entries

tools/ldgen/linker_script.py

@@ -1,17 +1,6 @@
 #
-# Copyright 2021 Espressif Systems (Shanghai) CO LTD
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
 #
 
 import collections
@@ -69,8 +58,6 @@ class LinkerScript:
                 target = member.target
                 rules = member.rules
 
-                del rules[:]
-
                 rules.extend(mapping_rules[target])
             except KeyError:
                 message = GenerationException.UNDEFINED_REFERENCE + " to target '" + target + "'."