Rename COPYING to NOTICE and add MODULE_LICENSE_GPL file

The NOTICE and MODULE_LICENSE_GPL files is the convention used by
Android's Open Source Project.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/MODULE_LICENSE_GPL b/MODULE_LICENSE_GPL
new file mode 100644 (file)
index 0000000..e69de29

diff --git a/COPYING b/NOTICE
similarity index 100%
rename from COPYING
rename to NOTICE