Code review comment for lp:~bjornt/launchpad/bug-430813

Change 'make jscheck' to run only tests in the WindmillLayers.

A lot of the old funtest tests are failing, so the current 'make
jscheck' is quite useless. The plan is to have 'make jscheck' run only
the new-style tests, which all pass now, and then convert the old tests
while making sure the test actually passes. This has been discussed with
Francis and others.

I provided 'make jscheck_funtest' to run the old tests, in case someone
want to run them. This should get removed when all tests are converted.

This branch depends on lp:~bjornt/launchpad/windmill-test-layer, so if
the diff contains changes to other files than the Makefile, the diff is
probably incorrect.

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Björn Tillenius | https://launchpad.net/~bjornt