devtool: add a command to print an overall list of recipes that can be updated

devtool: add a command to print an overall list of recipes that can be updated

A sample portion of the output:

$ devtool check-upgrade-status
...
NOTE: acpid                     2.0.30          2.0.31          Ross Burton <ross.burton@intel.com>
NOTE: u-boot-fw-utils           2018.11         2019.01         Marek Vasut <marek.vasut@gmail.com> d3689267f92c5956e09cc7d1baa4700141662bff
NOTE: u-boot-tools              2018.11         2019.01         Marek Vasut <marek.vasut@gmail.com> d3689267f92c5956e09cc7d1baa4700141662bff
NOTE: u-boot                    2018.11         2019.01         Marek Vasut <marek.vasut@gmail.com> d3689267f92c5956e09cc7d1baa4700141662bff
NOTE: bind                      9.11.5          9.13.5          Armin Kuster <akuster808@gmail.com>  cannot be updated due to: 9.11 is LTS 2021
NOTE: iproute2                  4.19.0          4.20.0          Changhyeok Bae <changhyeok.bae@lge.com>
NOTE: ofono                     1.25            1.27            Ross Burton <ross.burton@intel.com>
NOTE: wpa-supplicant            2.6             2.7             Changhyeok Bae <changhyeok.bae@lge.com>
NOTE: base-passwd               3.5.29          3.5.45          Anuj Mittal <anuj.mittal@intel.com>  cannot be updated due to: Version 3.5.38 requires cdebconf for update-passwd utility
NOTE: busybox                   1.29.2          1.30.0          Andrej Valek <andrej.valek@siemens.com>
NOTE: dbus-test                 1.12.10         1.12.12         Chen Qi <Qi.Chen@windriver.com>
NOTE: dbus                      1.12.10         1.12.12         Chen Qi <Qi.Chen@windriver.com>
NOTE: glib-2.0                  2.58.0          2.58.3          Anuj Mittal <anuj.mittal@intel.com>
NOTE: glib-networking           2.54.1          2.58.0          Anuj Mittal <anuj.mittal@intel.com>
...

(From OE-Core rev: 02284423b6391c77da19912192fc607fedb05e67)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>