tools: Add 420p10 support to dump_ciede2000.py
tools: Add 420p10 support to dump_ciede2000.py

Support comparing different depths, just because.

Signed-off-by: David Michael Barr <e9d71f5ee7c92d6dc9e92ffdad17b8bd49418f98@rr-dav.id.au>

ycho/daala,xiph/daala,luctrudeau/daala,luctrudeau/daala,ycho/daala,xiph/daala,luctrudeau/daala,xiph/daala,ycho/daala,xiph/daala,luctrudeau/daala,xiph/daala,luctrudeau/daala,ycho/daala,ycho/daala