[MacPorts] #17279: Use xcode PortGroup in gpgme-objc

[MacPorts]

#17279: Use xcode PortGroup in gpgme-objc
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 Reporter:  nox at macports.org    |       Owner:  waqar at macports.org
     Type:  enhancement         |      Status:  new               
 Priority:  Normal              |   Milestone:  Port Enhancements 
Component:  ports               |     Version:                    
 Keywords:  xcode PortGroup cd  |        Port:  gpgme-objc        
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 gpgme-objc does not currently use the xcode PortGroup and use the [#12914
 `cd` TCL procedure]. Furthermore, it always build universally and it does
 not install where it should.

 Changes:
  * Ported to xcode-1.0 PortGroup.
  * Added libpgp-error lib dependency.
  * Do not use the `cd` procedure (see #12914).

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Ticket URL: <http://trac.macports.org/ticket/17279>
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