Do not delete platform independent pre-processed sources during sdist
Do not delete platform independent pre-processed sources during sdist

Since only platform independent pre-processed sources are now left in the
src dirs we don't have to delete any pre-processed sources and can just
inlcude them all into the src tarball.
Ideally we'd track this slightly better in future, it's not nice to be keeping
any generates sources in the src dirs, they should be considered read-only.

20070501142419-9561d-04014338b37adc61375ac8509b6c7debc09d6958.gz

dcreager/cabal,dcreager/cabal