[MacPorts] #70602: DeaDBeeF: switch from Xcode to autotools, at least for < 10.13

[MacPorts]

#70602: DeaDBeeF: switch from Xcode to autotools, at least for < 10.13
--------------------------+----------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.10.1
 Keywords:                |       Port:  DeaDBeeF
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 Xcode project is restricted to 10.13+: https://github.com/DeaDBeeF-
 Player/deadbeef/blob/a50e3a54261abcfcd8a4e627edc3a8b94ace6aff/osx/deadbeef.xcodeproj/project.pbxproj#L24148

 However, `DeaDBeeF` has also an autotools-based build implementation
 (which may be preferred anyway, since it is properly configurable), so at
 least on < 10.13 that should be used instead of Xcode.

 From the quick look at the source, there is nothing in CoreAudio plugin
 which cannot build on older systems (perhaps with minimal patches down to
 10.5), and this is the only important component to have Mac-way, since for
 GUI there is GTK3.

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Ticket URL: <https://trac.macports.org/ticket/70602>
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