Fix test error on Windows

We need to wrap the `test_path` in a `Path` to ensure proper escaping.

Author: phil-opp

example-kernels/tester/tests/integration_tests.rs

@@ -1,9 +1,11 @@
+use std::path::Path;
+
 include!(env!("GENERATED_TESTS"));
 
 fn run_test(test_path: &str) {
     let mut cmd = std::process::Command::new("bootimage");
     cmd.arg("tester");
-    cmd.arg(test_path);
+    cmd.arg(Path::new(test_path));
     cmd.arg("--target");
     cmd.arg("../x86_64-bootimage-example-kernels.json");
     let output = cmd.output().expect("failed to run bootimage");