[MacPorts] #40786: virtualbox and sub-ports: update to 4.3

[MacPorts]

#40786: virtualbox and sub-ports: update to 4.3
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  Reporter:  mail@…                              |      Owner:  macports-
      Type:  update                              |  tickets@…
  Priority:  Normal                              |     Status:  new
 Component:  ports                               |  Milestone:
Resolution:                                      |    Version:
      Port:  virtualbox virtualbox-extension-    |   Keywords:
  pack virtualbox-guest-additions                |
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Comment (by royliu@…):

 Overriding
 `/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/sys/param.h`
 will do the trick, since it contains the conflicting definition of `PVM`.
 You'll then have to adapt old Carbon calls to the new APIs.

 I doubt the VirtualBox devs will address the issue soon, since the use of
 `PVM` is pervasive.

 Have (un)fun!

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Ticket URL: <https://trac.macports.org/ticket/40786#comment:20>
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