autotools: include COPYING file

Closes: #3484.
Suggested-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/COPYING b/COPYING
new file mode 100644 (file)
index 0000000..9c21e2c
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,2 @@
+All files have SPDX headers that declare what license applies. The applicable
+licenses are included in the code repository.