bitbake: bitbake: Add initial pass of SPDX license headers to source code

This adds the SPDX-License-Identifier license headers to the majority of
our source files to make it clearer exactly which license files are under.

The bulk of the files are under GPL v2.0 with one found to be under V2.0
or later, some under MIT and some have dual license. There are some files
which are potentially harder to classify where we've imported upstream code
and those can be handled specifically in later commits.

The COPYING file is replaced with LICENSE.X files which contain the full
license texts.

(Bitbake rev: ff237c33337f4da2ca06c3a2c49699bc26608a6b)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/bin/bitbake

@@ -9,6 +9,8 @@
 # Copyright (C) 2005        ROAD GmbH
 # Copyright (C) 2006        Richard Purdie
 #
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.

bitbake/bin/bitbake-diffsigs

@@ -5,6 +5,8 @@
 #
 # Copyright (C) 2012-2013, 2017 Intel Corporation
 #
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.

bitbake/bin/bitbake-hashserv

@@ -2,6 +2,8 @@
 #
 # Copyright (C) 2018 Garmin Ltd.
 #
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.

bitbake/bin/bitbake-layers

@@ -7,6 +7,8 @@
 # Copyright (C) 2011 Mentor Graphics Corporation
 # Copyright (C) 2011-2015 Intel Corporation
 #
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.

bitbake/bin/bitbake-prserv

@@ -1,4 +1,8 @@
 #!/usr/bin/env python3
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
 import os
 import sys,logging
 import optparse

bitbake/bin/bitbake-selftest

@@ -2,6 +2,8 @@
 #
 # Copyright (C) 2012 Richard Purdie
 #
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.

bitbake/bin/bitbake-worker

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
 
 import os
 import sys

bitbake/bin/bitdoc

@@ -4,6 +4,8 @@
 #
 # Copyright (C) 2005 Holger Hans Peter Freyther
 #
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.

bitbake/bin/git-make-shallow

@@ -1,4 +1,8 @@
 #!/usr/bin/env python3
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
 """git-make-shallow: make the current git repository shallow
 
 Remove the history of the specified revisions, then optionally filter the

bitbake/bin/toaster

@@ -3,7 +3,9 @@
 # toaster - shell script to start Toaster
 
 # Copyright (C) 2013-2015 Intel Corp.
-
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
 # This program 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 2 of the License, or

bitbake/bin/toaster-eventreplay

@@ -4,10 +4,11 @@
 #
 # Copyright (C) 2014        Alex Damian
 #
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # This file re-uses code spread throughout other Bitbake source files.
 # As such, all other copyrights belong to their own right holders.
 #
-#
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
 # published by the Free Software Foundation.