chicken-install cache does not know if an egg has tests

[sjamaan]

If an egg is already in cache, it will not be downloaded again even if you run chicken-install -test later. This means the tests won't be run if you fetched it without tests before (as chicken-install thinks there are no tests).

Example:

$ chicken-install -retrieve bind
bind located at /home/peter/.chicken-install/cache/bind
$ chicken-install -test bind
.... <installs, but no tests are run> ....

Actually, this also happens when retrieving an egg implicitly when you install it for the first time without -test and then re-install it with -test.

Either we need to somehow record if the egg was retrieved with or without tests, and re-retrieve it if the tests are missing, or simply make -test implied when fetching the egg.

[sjamaan]

Fixed by c571cff