Makefile: simplify test, and exclude macOS (darwin)

[thaJeztah]

Excluding darwin, as this package doesn't support it, but a developer may try running the tests on a Mac.

[thaJeztah]

/cc @kolyshkin

[kolyshkin]

@thaJeztah have you checked if CI failures are related?

I'm afraid they are. This is a thing with two dependent packages from the same repo. If you want to test them together, you need to add replace github.com/moby/sys/mountinfo ../mountinfo in mount's go.mod for the test. I think it makes more sense to test packages separately, but I am open to discussion.

I suggest drop the makefile changes, but keep the package changes.

Or, add the above replace in the test.

[thaJeztah]

Oh, thanks for the ping; yes, I think the failure is related, I realised this doesn't work after opening (but didn't dig deep yet).

Let me have a look at splitting that change

[thaJeztah]

@kolyshkin opened #13

closing this one