use github's file hosting for the tiny lir test data
use github's file hosting for the tiny lir test data

Signed-off-by: dave bl <0352a8acc949c7df21fec16e566ba9a74e797a97@d1b.org>

ioerror/blockfinder,d1b/blockfinder,d1b/blockfinder,Starefossen/docker-blockfinder,ioerror/blockfinder,Starefossen/docker-blockfinder