This adds the missing input files used for this test, except for the separate input files for specific error cases; matching test input files were provided by Nico Weber. (I found test input files at https://github.com/nico/hack/tree/master/res/test that seem to match most of the missing ones for the existing icon/cursor test.)
The extra copying of files into the %t directory doesn't seem to be necessary since that directory only ever is used for output here, not for inputs.