test-runner: fix ctrl-c for UML

The TIOCSTTY ioctl was not shared between UML and QEMU which prevented
any console input from making it into UML. This fixes that, and now
ctrl-c can be used to stop UML test execution.

tools/runner.py

@@ -277,6 +277,8 @@ class RunnerAbstract:
 				else:
 					os.remove(f)
 
+		fcntl.ioctl(STDIN_FILENO, TIOCSTTY, 1)
+
 	def cleanup_environment(self):
 		rmtree('/tmp/iwd')
 		rmtree('/tmp/certs')
@@ -479,8 +481,6 @@ class QemuRunner(RunnerAbstract):
 
 		super().prepare_environment()
 
-		fcntl.ioctl(STDIN_FILENO, TIOCSTTY, 1)
-
 	def stop(self):
 		RB_AUTOBOOT = 0x01234567
 		#