Fix missing target field for params

Author: kateinoigakukun

lib/ruby_wasm/rake_task.rb

@@ -49,7 +49,7 @@ def initialize(
     @baseruby = RubyWasm::BaseRubyProduct.new(@build_dir, @source)
     @openssl = RubyWasm::OpenSSLProduct.new(@build_dir, @target, @toolchain)
 
-    build_params = RubyWasm::BuildParams.new(options.merge(name: name))
+    build_params = RubyWasm::BuildParams.new(options.merge(name: name, target: target))
 
     @crossruby =
       RubyWasm::CrossRubyProduct.new(