ci: use LGPLv2+ for all our ci configuration

.github/workflows/build_test.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 set -ex
 

.github/workflows/build_test.yml

@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 #
 name: Build test
 on:

.github/workflows/cifuzz.yml

@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 # See: https://google.github.io/oss-fuzz/getting-started/continuous-integration/
 
 name: CIFuzz

.github/workflows/coverity.yml

@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 #
 name: Coverity
 

.github/workflows/labeler.yml

@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 #
 name: "Pull Request Labeler"
 

.github/workflows/linter.yml

@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 # https://github.com/marketplace/actions/super-linter
 name: Lint Code Base
 

.github/workflows/mkosi.yml

@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 # Simple boot tests that build and boot the mkosi images generated by the mkosi config files in mkosi.default.d/.
 name: mkosi
 

.github/workflows/unit_tests.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 # shellcheck disable=SC2206
 PHASES=(${@:-SETUP RUN RUN_ASAN_UBSAN CLEANUP})

.github/workflows/unit_tests.yml

@@ -1,5 +1,6 @@
 ---
 # vi: ts=2 sw=2 et:
+# SPDX-License-Identifier: LGPL-2.1-or-later
 #
 name: Unit tests
 on: