[MacPorts] #47790: update pstree to 2.39

[MacPorts]

#47790: update pstree to 2.39
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 Reporter:  hans@…    |      Owner:  macports-tickets@…
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.3
 Keywords:  haspatch  |       Port:  pstree
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 Update pstree to version 2.39:


 * instead of a ./configure that >>'s a Makefile, have minimal Makefile
   and set use_configure no

 * drop the destroot commands in Portfile
   and just make destroot with the Makefile

 * pstree has a manpage, so just install that
   instead of copying the README

 * drop the clang fix as http://llvm.org/pr10514 is fixed

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Ticket URL: <https://trac.macports.org/ticket/47790>
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