keep the list sorted

Change-Id: I603e3f8d43a2e2ee6c81005673c6755f541166f4
handle tarballs w/ and w/out checksum together

This makes it easier to drop the checksum from tarball's name on update,
as there is no change needed outside download.lst.

Change-Id: I474387fdf6d1cdee682011cf9cd39c36be2c131c
merge the tarball lists

Change-Id: I37f197c926f2ee2b68d1919285b4c903ef8247d6