scripted-diff: Insert missed copyright headers

-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py insert contrib/guix/libexec/build.sh
./contrib/devtools/copyright_header.py insert contrib/guix/libexec/codesign.sh
./contrib/devtools/copyright_header.py insert contrib/tracing/log_raw_p2p_msgs.py
./contrib/devtools/copyright_header.py insert contrib/tracing/log_utxocache_flush.py
./contrib/devtools/copyright_header.py insert contrib/tracing/p2p_monitor.py
./contrib/devtools/copyright_header.py insert test/lint/lint-files.sh
-END VERIFY SCRIPT-

Author: hebasto

contrib/guix/libexec/build.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2019-2021 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 export LC_ALL=C
 set -e -o pipefail
 export TZ=UTC

contrib/guix/libexec/codesign.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2021 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 export LC_ALL=C
 set -e -o pipefail
 export TZ=UTC

contrib/tracing/log_raw_p2p_msgs.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# Copyright (c) 2021 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 """ Demonstration of eBPF limitations and the effect on USDT with the
     net:inbound_message and net:outbound_message tracepoints. """

contrib/tracing/log_utxocache_flush.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# Copyright (c) 2021 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 import sys
 import ctypes

contrib/tracing/p2p_monitor.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# Copyright (c) 2021 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 """ Interactive bitcoind P2P network traffic monitor utilizing USDT and the
     net:inbound_message and net:outbound_message tracepoints. """

test/lint/lint-files.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2021 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 export LC_ALL=C