[MacPorts] #60128: golang portgroup 1.0: add support for -ldflags

[MacPorts]

#60128: golang portgroup 1.0: add support for -ldflags
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  Reporter:  emcrisostomo  |      Owner:  (none)
      Type:  enhancement   |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:                |
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Comment (by kencu):

 there are also features like this
 {{{
 build.pre_args-prepend
 }}}
 These are a bit unweildy perhaps, but may help you shoehorn flags in right
 where you want them to go, in certain cases.

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Ticket URL: <https://trac.macports.org/ticket/60128#comment:3>
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