Apart from the expected Makefile -> main.fmf conversion, this also does
a couple more tweaks to make the tests pass in CI, namely:
- adds a missing bzip2 dependency
- the msi/msp/mst tests from file-tests are timezone-dependent, so the
reference timestamps were adjusted for the UTC timezone (used in
CIs); not sure if there's any nicer way to tell file to always
assume UTC when generating the timestamps without touching timezone
data on the test machine itself
