Emit CONFFILES variable in pkgdata, or else the get_conffiles function
will return 'None' for some packages instead of the expected value. This
is especially true for optional module packages.
(From OE-Core rev: ee44dabc065912ac17f1ee5f06f12695c90b5482)
Signed-off-by: David Vincent <freesilicon@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>