Following up ruby core changes.

spec/spec_helper.rb

@@ -123,6 +123,12 @@ def self.ruby=(ruby)
     Gem.ruby = orig_ruby if ENV["BUNDLE_RUBY"]
   end
 
+  config.before :suite do
+    if ENV["BUNDLE_RUBY"]
+      FileUtils.cp_r Spec::Path.bindir, File.join(Spec::Path.root, "lib", "exe")
+    end
+  end
+
   config.before :all do
     build_repo1
   end
@@ -147,4 +153,10 @@ def self.ruby=(ruby)
     Dir.chdir(original_wd)
     ENV.replace(original_env)
   end
+
+  config.after :suite do
+    if ENV["BUNDLE_RUBY"]
+      FileUtils.rm_rf File.join(Spec::Path.root, "lib", "exe")
+    end
+  end
 end

spec/support/path.rb

@@ -13,7 +13,7 @@ def gemspec
     end
 
     def bindir
-      @bindir ||= root.join(ruby_core? ? "bin" : "exe")
+      @bindir ||= root.join(ruby_core? ? "libexec" : "exe")
     end
 
     def spec_dir