Restore ext/json/extconf.rb

hsbt · hsbt · commit caa946f2deba · 2024-10-26T18:44:15.000+09:00
diff --git a/ext/json/extconf.rb b/ext/json/extconf.rb
@@ -0,0 +1,3 @@
+require 'mkmf'
+
+create_makefile('json')
