scripts: introduce footprint diffing

Very simple script to diff between two ram or rom reports generated by
size_report. When you call call the ram_report or rom_report targets you
end up with a json file in the build directory that can be used as input
for this script.

The output shows which symbols insreased and which decreased in size and
also tracked added/remove symbols as well.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
1 file changed