Code review comment for lp:~bjornt/launchpad/jscheck-all-layers

'make jscheck' currently run bin/test multiple times; once for each
Windmill layer we have. This has the effect that if one test fails in a
layer, the tests in the next layers won't be run.

This branch changes 'make check' to invoke bin/test only once. Instead
of specifying each layer individually, I chose to specify WindmillLayer,
which will match all layers containing the string WindmillLayer, so that
people don't have to bother modifying the jscheck target when adding new
layers.

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