test/system: Ensure that 'toolbox run false' has exit code 1

This is a precursor to checking that higher valued exit codes from the
command running inside the container are retained, and commands like
test(1) can be used with 'toolbox run ...' in subsequent test cases.

https://github.com/containers/toolbox/pull/1163

test/system/104-run.bats

@@ -22,6 +22,15 @@ teardown() {
   assert_output ""
 }
 
+@test "run: Smoke test with false(1)" {
+  create_default_container
+
+  run -1 $TOOLBOX run false
+
+  assert_failure
+  assert_output ""
+}
+
 @test "run: Ensure that a login shell is used to invoke the command" {
   create_default_container