adapt debug test

Author: timfel

graalpython/com.oracle.graal.python.test/src/com/oracle/graal/python/test/debug/PythonDebugTest.java

@@ -168,7 +168,7 @@ public void testSteppingAsExpected() throws Throwable {
             });
             expectSuspended((SuspendedEvent event) -> {
                 DebugStackFrame frame = event.getTopStackFrame();
-                assertEquals(9, frame.getSourceSection().getStartLine());
+                assertEquals(8, frame.getSourceSection().getStartLine());
                 event.prepareStepOut(1);
             });
             expectSuspended((SuspendedEvent event) -> {