libdcp/test/data/extra_assetmap, branch split

libdcp/test/data/extra_assetmap, branch split DCP handling library https://git.carlh.net/cgit/libdcp/atom?h=split 2020-10-10T16:58:05Z Fix crash when loading DCPs whose ASSETMAP contains files that are 2020-10-10T16:58:05Z Carl Hetherington cth@carlh.net 2020-10-10T16:58:05Z urn:sha1:4c8cc9e99678a4095772f283ffaaa1d6bd8aaf67 not mentioned in any PKL (#1855).