[MacPorts] #58637: ispc: update to 1.11.0

[MacPorts]

#58637: ispc: update to 1.11.0
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 Reporter:  Schamschula  |      Owner:  tenomoto
     Type:  defect       |     Status:  assigned
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  ispc
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 ispc 1.11.0 was released 2019-04-19.

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Ticket URL: <https://trac.macports.org/ticket/58637>
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