The makefile uses cp -P behind the scenes for installing the tutorial files
and this preserves the build user identity. Fix this to the correct
owner/group. Usually do_package fixes and hides this but it can be seen
in do_install.
(From OE-Core rev: 34ef5c2a8d77fcb4a51c875a443f7b97b409586e)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>