[MacPorts] #35231: cgal: update to 4.0.2 and fix build with Boost 1.50.0

[MacPorts]

#35231: cgal: update to 4.0.2 and fix build with Boost 1.50.0
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 Reporter:  raphael@…             |       Owner:  vince@…           
     Type:  update                |      Status:  new               
 Priority:  Normal                |   Milestone:                    
Component:  ports                 |     Version:                    
 Keywords:  haspatch              |        Port:  cgal              
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 The attached patch updates cgal to version 4.0.2. It also adds a
 dependency on eigen3, which now can be used with cgal, and metis, which is
 used by some examples.

 The other patch fixes a [http://cgal-discuss.949826.n4.nabble.com/Surface-
 reconstruction-points-3-demo-and-example-building-problem-MacOS-
 td4655406.html#a4655410 build problem with Boost 1.50.0].

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Ticket URL: <https://trac.macports.org/ticket/35231>
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