Add JSON.pm to third_party

third_party/JSON/JSON-2.59/t/00_pod.t

Index: third_party/JSON/JSON-2.59/t/00_pod.t
diff --git a/third_party/JSON/JSON-2.59/t/00_pod.t b/third_party/JSON/JSON-2.59/t/00_pod.t
new file mode 100644
index 0000000000000000000000000000000000000000..e8e308251307a7e8754a6c4ce3b3c423f9e79702
--- /dev/null
+++ b/third_party/JSON/JSON-2.59/t/00_pod.t
@@ -0,0 +1,8 @@
+use strict;
+$^W = 1;
+
+use Test::More;
+
+eval "use Test::Pod 1.00";
+plan skip_all => "Test::Pod 1.00 required for testing POD" if $@;
+all_pod_files_ok ();