Add license headers to non copyrightable files

.git-blame-ignore-revs

+# SPDX-FileCopyrightText: none
+# SPDX-License-Identifier: CC0-1.0
 # clang-format
 7040e191d566e287e60b132e74c92beb3544f30d

.gitignore

+# SPDX-FileCopyrightText: none
+# SPDX-License-Identifier: CC0-1.0
 build
 *.kdev4
 .kdev4

src/kcm/Messages.sh

 #! /usr/bin/env bash
+
+# SPDX-FileCopyrightText: none
+# SPDX-License-Identifier: CC0-1.0
+
 $XGETTEXT `find . -name "*.cpp" -o -name "*.qml"` -o $podir/kcm_bolt.pot
 $XGETTEXT -j -L JavaScript `find . -name "*.js"` -o $podir/kcm_bolt.pot
 

src/kded/Messages.sh

 #!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: none
+# SPDX-License-Identifier: CC0-1.0
+
 $XGETTEXT `find . -name '*.cpp'` -o $podir/kded_bolt.pot