We should ignore BB_ORIGENV from the hash for the config data. There
are also a number of variables which no longer make it into the data
store so we can drop these from the hash whitelist.
(From OE-Core rev: cb21af00f9321ea48e533089dbffbb1a9665cb92)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>