Increase test_issue39_regression alarm time

Author: AdrianBunk

tests/test_regr1.py

@@ -107,7 +107,7 @@ def run_test(self):
         'no need to test on macOS where spawn is used instead of fork')
     def test_issue39_regression(self):
         signal.signal(signal.SIGALRM, self.on_alarm)
-        signal.alarm(5)
+        signal.alarm(10)
 
         try:
             self.running = True