[RTEMS Project] #4700: Fix isntances of "is" operator used with literals

[RTEMS trac]

#4700: Fix isntances of "is" operator used with literals
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  Reporter:  Ryan Long  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  normal     |  Milestone:  6.1
 Component:  tool       |    Version:  6
  Severity:  normal     |   Keywords:
Blocked By:             |   Blocking:
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 Python 3.8 introduced new warnings when using the "is" operator when
 comparing literals.

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Ticket URL: <http://devel.rtems.org/ticket/4700>
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