cmd/refer Makefile is a bit bogus
Currently the cmd/refer Makefile does something which is a bit invalid, but due to weird bugs in the current studio dmake does work.
The problem here is that it depends on the same target (a subdirectory) twice. The different in execution here is a conditional variable. However, if you depend on the same target twice, even with different conditional variables, make will still only execute it once. In this specific case, that means that the all target will be executed, which is basically a no-op, but the install target will not be executed in the subdirectory because we've already made it. The fix here is to have this match what all of the rest of the ON Makefiles look like when descending down into subdirectories.