ensure we use the latest config familiy

Author: kateinoigakukun

lib/ruby_wasm/build_system/product/ruby_source.rb

@@ -38,6 +38,7 @@ def define_task
         fetch
       end
       file configure_file => [src_dir] do
+        sh "ruby tool/downloader.rb -d tool -e gnu config.guess config.sub", chdir: src_dir
         sh "./autogen.sh", chdir: src_dir
       end
     end