distrodata: add a utility script to compare list of recipes

distrodata: add a utility script to compare list of recipes

distrocompare.sh is added to compare the added list of recipes
between two releases. The output of the script will share the
information of the licenses required and other distributions
that are using the package.

If a single input is provided, it will compare the current
branch with the provided branch/commit-ish package list.

To run : distrocompare.sh <older hash> <newer hash>
E.g. distrocompare.sh morty 92aa0e7
E.g. distrocompare.sh morty pyro
E.g. distrocompare.sh morty

output : The script will produce a file ending with
new_recipe_list.txt preceeded by the branch name from input

(From OE-Core rev: 32b363c2ba91fde4f10e5fe2c898b2fc2702aa85)

Signed-off-by: Tan Shen Joon <shen.joon.tan@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>