reuse spdx: also output the full SPDX-License-Identifier #586
Description
The output of reuse spdx has the LicenseInfoInFile field.
However, with this field it is not always possible to determine the original value of SPDX-License-Identifier
For example if the input file has
// Copyright (C) 2016 Paul Lemire <paul.lemire350@gmail.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
The output will be
FileName: ./qt3d/tests/auto/input/utils/tst_utils.cpp
SPDXID: SPDXRef-ec9701a4a6e83e5c346e9f4377005153
FileChecksum: SHA1: 78c032c19e50ba890da9609caca80ca3edea1166
LicenseConcluded: NOASSERTION
LicenseInfoInFile: GPL-3.0-only
LicenseInfoInFile: LicenseRef-Qt-Commercial
LicenseInfoInFile: Qt-GPL-exception-1.0
FileCopyrightText: <text>Copyright (C) 2016 Paul Lemire <paul.lemire350@gmail.com></text>
Which is not sufficient to determine the SPDX-License-Identifier
This information would be useful when using the reuse spdx output as input of another script (for example to build a DEP5 file)