fix missing output when lldb is buffering output (#474)

Author: Ukalnins

src/scripts/lldb.py

@@ -126,6 +126,7 @@ def ProcessSTDERR():
             stderr = process.GetSTDERR(1024)
 
     def CloseOut():
+        sys.stdout.flush()
         if (out):
             out.close()
         if (err):