[MacPorts] #68422: tinygltf fail on 10.7–10.10

[MacPorts]

#68422: tinygltf fail on 10.7–10.10
--------------------------+----------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.8.1
 Keywords:                |       Port:  tinygltf
--------------------------+----------------------
 {{{
 In file included from
 /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/array:106:
 /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/utility:259:9:
 error:4:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_graphics_tinygltf/tinygltf/work/tinygltf-2.8.17/tiny_gltf.h:40:
 In file included from
 /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/array:106:
 /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/utility:259:9:
 error: field has incomplete type
 'nlohmann::json_abi_v3_11_2::basic_json<std::map, std::vector,
 std::__1::basic_string<char>, bool, long long, unsigned long long, double,
 std::allocator, adl_serializer, std::__1::vector<unsigned char,
 std::__1::allocator<unsigned char> > >'
     _T2 second;
         ^
 }}}

 https://build.macports.org/builders/ports-10.10_x86_64-builder/builds/242383/steps
 /install-port/logs/stdio

 Apparently we need to blacklist old Apple clangs.

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Ticket URL: <https://trac.macports.org/ticket/68422>
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