Added panic integration test

tests/panic.rs

@@ -0,0 +1,12 @@
+mod common;
+
+use common::{build_hermit_bin, run_simple_vm};
+
+#[test]
+fn panic_test() {
+	env_logger::try_init().ok();
+	let bin_path = build_hermit_bin("panic");
+	let res = run_simple_vm(bin_path);
+	println!("Kernel output: {:?}", res);
+	assert_eq!(res.code, -1);
+}

tests/test-kernels/src/bin/panic.rs

@@ -0,0 +1,7 @@
+#[cfg(target_os = "hermit")]
+use hermit as _;
+
+fn main() {
+	println!("This test panics");
+	panic!("Aaaaaaaaargh!!!");
+}