[MacPorts] #60188: lmdb: Add a package config file

[MacPorts]

#60188: lmdb: Add a package config file
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  Reporter:  marka63      |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  lmdb         |
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Comment (by ryandesign):

 Since the latest version of lmdb still doesn't install a pkg-config .pc
 file, and since I could not find a bug report about it, I have now filed
 one: https://bugs.openldap.org/show_bug.cgi?id=9457

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Ticket URL: <https://trac.macports.org/ticket/60188#comment:2>
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