* Add do_shared_workdir which was added recently
* Add do_fetch and do_unpack to this list, because at the moment if you
enable externalsrc through a bbappend the += in this class wipes out
the original value from externalsrc (which is set with ?=)
(From OE-Core rev: 5717e3b60731d2cb9394c13bff049a467c3aeec1)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>