xdg-shell: Bump unstable version to 6

This copies the version 5 of the XML to a new version 6 version, while
at the same time the interface names are changed to use the unstable
naming convention.

A whitespace cleanup was done as no git-blame:ability would be lost
anyway.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Mike Blumenkrantz <zmike@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
2 files changed