[MacPorts] #36395: gcc47: update to 4.7.2

[MacPorts]

#36395: gcc47: update to 4.7.2
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  Reporter:  manphiz@…  |      Owner:  mww@…
      Type:  update     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.1.2
Resolution:             |   Keywords:  haspatch
      Port:  gcc47      |
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Comment (by manphiz@…):

 Replying to [comment:3 jeremyhu@…]:
 > Also, your patch ignored this comment:
 > {{{
 > # When version is updated, please delete the separate revision for
 libstdcxx below (and delete this comment)
 > }}}
 I wasn't so sure about how to handle the symlinks which were marked to be
 dropped as well, so I didn't touch the libstdcxx subport at all. Also, it
 makes more sense to avoid bootstrap for subport libstdcxx, but I don't
 really know how to do that as I'm not familiar with macports system
 enough. It will be good to see how to do these correctly.

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Ticket URL: <https://trac.macports.org/ticket/36395#comment:4>
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