libcamera: Add missing SPDX headers to miscellaneous small files

Add missing SPDX headers to miscellaneous small files. Use CC0-1.0 for
meson.build, .gitignore and the small include/linux/README, and licenses
matching the corresponding component for other files.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

.gitignore

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: CC0-1.0
+
 __pycache__/
 build/
 patches/

include/linux/README

@@ -1,2 +1,4 @@
+# SPDX-License-Identifier: CC0-1.0
+
 Files in this directory are imported from v5.2 of the Linux kernel. Do not
 modify them manually.

src/ipa/raspberrypi/README.md

@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: BSD-2-Clause
+
 # _libcamera_ for the Raspberry Pi
 
 Raspberry Pi provides a fully featured pipeline handler and control algorithms

src/ipa/raspberrypi/data/meson.build

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: CC0-1.0
+
 conf_files = files([
     'imx219.json',
     'imx477.json',

src/ipa/vimc/data/vimc.conf

@@ -1 +1,3 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
 # Dummy configuration file for the vimc IPA.

src/qcam/assets/feathericons/feathericons.qrc

@@ -1,3 +1,4 @@
+<!-- SPDX-License-Identifier: GPL-2.0-or-later -->
 <!DOCTYPE RCC><RCC version="1.0">
 <qresource>
 <file>./aperture.svg</file>