Adjust jit_support file path.

test/ruby/test_jit.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 require 'test/unit'
 require 'tmpdir'
-require_relative '../lib/jit_support'
+require_relative '../../tool/lib/jit_support'
 
 return if RbConfig::CONFIG["MJIT_SUPPORT"] == 'no'
 

test/ruby/test_rubyoptions.rb

@@ -4,7 +4,7 @@ require 'test/unit'
 require 'timeout'
 require 'tmpdir'
 require 'tempfile'
-require_relative '../lib/jit_support'
+require_relative '../../tool/lib/jit_support'
 
 class TestRubyOptions < Test::Unit::TestCase
   NO_JIT_DESCRIPTION =

test/ruby/test_rubyvm_mjit.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 require 'test/unit'
-require_relative '../lib/jit_support'
+require_relative '../../tool/lib/jit_support'
 
 return if RbConfig::CONFIG["MJIT_SUPPORT"] == 'no'
 

test/test_open3.rb

@@ -2,7 +2,7 @@
 
 require 'test/unit'
 require 'open3'
-require_relative 'lib/jit_support'
+require_relative '../tool/lib/jit_support'
 
 class TestOpen3 < Test::Unit::TestCase
   RUBY = EnvUtil.rubybin