Allows executing the tests with a runner

[malbarbo]

Consider reading the cargo runner parameter or adding an alternative way to specify the test runner. This would allows testing cross compiled tests (for now, one must rely on binfmt).

[laumann]

If I understand the runner thing right, specifying something like "bash" or "python" would make cargo run those with the compiled program as first parameter?

I'm not sure what this should look like in compiletest, maybe a configuration parameter or something?

[malbarbo]

If I understand the runner thing right, specifying something like "bash" or "python" would make cargo run those with the compiled program as first parameter?

Yes. But guess what? The Config::runtool options does exactly that! It is used to run valgrind, but I was able to it to run qemu.

Thanks!