bitbake: cooker: add data to the dependency tree dump

bitbake: cooker: add data to the dependency tree dump

Toaster needes to record extra data that needs to
be moved at the time of the dependency tree dump.

This data includes:
* layer priorities for recording in the layer section
* the inherit list for each PN which allows to determine
the type of the PN (regular package, image, etc).

This patch adds this data to the dependency tree dump.

(Bitbake rev: 7636aba37320aaf9b044d3832ddc21af51ccd69c)

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>