[MacPorts] #69269: libsdl2 2.30.0_0 fails to build on Catalina 10.15.7

[MacPorts]

#69269: libsdl2 2.30.0_0 fails to build on Catalina 10.15.7
--------------------+---------------------
 Reporter:  ednl    |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.9.1
 Keywords:          |       Port:  libsdl2
--------------------+---------------------
 * MacOS Catalina 10.15.7
 * MacPorts 2.9.1
 * libsdl2 installed: 2.28.5_0
 * libsdl2 available: 2.30.0_0

 Build error:
 {{{
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.30.0/src/joystick/iphoneos/SDL_mfijoystick.m:1140:84:
 error: property 'physicalInputProfile' not found on object of type
 'GCController *'
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_libsdl2/libsdl2/work/SDL2-2.30.0/src/joystick/iphoneos/SDL_mfijoystick.m:1141:87:
 error: property 'physicalInputProfile' not found on object of type
 'GCController *'
 }}}

 Also 8 deprecated warnings around 'gamepad', see attached log file.

-- 
Ticket URL: <https://trac.macports.org/ticket/69269>
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