Tweak test data for signed package installation

* test/lisp/emacs-lisp/package-resources/signed/signed-bad-1.0.el:
* test/lisp/emacs-lisp/package-resources/signed/signed-good-1.0.el:
Use lexical-binding.
* test/lisp/emacs-lisp/package-resources/signed/update-signatures.sh:
New file.
* test/lisp/emacs-lisp/package-resources/key.pub:
* test/lisp/emacs-lisp/package-resources/key.sec: Add new key.
* test/lisp/emacs-lisp/package-resources/signed/signed-good-1.0.el.sig:
* test/lisp/emacs-lisp/package-resources/signed/archive-contents.sig:
Update signatures using new key.

test/lisp/emacs-lisp/package-resources/key.pub

@@ -1,18 +1,20 @@
 -----BEGIN PGP PUBLIC KEY BLOCK-----
-Version: GnuPG v1.4.14 (GNU/Linux)
 
-mQENBFJNB8gBCACfbtpvYrM8V1HM0KFlIwatcEJugHqwOHpr/Z9mrCW0fxyQAW/d
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-=b5Kg
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+Yn923VI=
+=NRtx
 -----END PGP PUBLIC KEY BLOCK-----

test/lisp/emacs-lisp/package-resources/key.sec

@@ -1,33 +1,35 @@
 -----BEGIN PGP PRIVATE KEY BLOCK-----
-Version: GnuPG v1.4.14 (GNU/Linux)
 
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-qGWO/WF7q5X0SCPZ
-=5FZK
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+=2DW8
 -----END PGP PRIVATE KEY BLOCK-----

test/lisp/emacs-lisp/package-resources/signed/signed-bad-1.0.el

@@ -1,4 +1,4 @@
-;;; signed-bad.el --- A single-file package with bad signature
+;;; signed-bad.el --- A single-file package with bad signature  -*- lexical-binding: t -*-
 
 ;; Author: J. R. Hacker <jrh@example.com>
 ;; Version: 1.0

test/lisp/emacs-lisp/package-resources/signed/signed-good-1.0.el

@@ -1,4 +1,4 @@
-;;; signed-good.el --- A single-file package with good signature
+;;; signed-good.el --- A single-file package with good signature  -*- lexical-binding: t -*-
 
 ;; Author: J. R. Hacker <jrh@example.com>
 ;; Version: 1.0

test/lisp/emacs-lisp/package-resources/signed/update-signatures.sh

@@ -0,0 +1,32 @@
+#! /bin/sh
+
+# Generate a new key and update the signatures for tests.
+
+# Copyright (C) 2020 Free Software Foundation, Inc.
+
+# This file is part of GNU Emacs.
+
+# GNU Emacs is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# GNU Emacs is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+export GPG_AGENT=""
+KEYRING="./key.ring"
+TRUSTDB="./trust.db"
+GPG="gpg --no-default-keyring --trustdb-name $TRUSTDB --keyring $KEYRING --yes"
+
+rm $KEYRING
+$GPG --full-generate-key
+$GPG --export --armor > "../key.pub"
+$GPG --export-secret-keys -armor > "../key.sec"
+$GPG --detach-sign --sign "./archive-contents"
+$GPG --detach-sign --sign "./signed-good-1.0.el"