[Inline] Remove dependence on #define_singleton_method so things work…

… on 1.8.7

lib/bundler/inline.rb

@@ -16,5 +16,6 @@ def definition.lock(file); end
   runtime.setup_environment
   runtime.setup.require
 
-  Bundler.send(:define_singleton_method, :root, old_root)
+  bundler_module = class << Bundler; self; end
+  Bundler.send(:define_method, :root, old_root)
 end

spec/runtime/inline_spec.rb

@@ -58,11 +58,10 @@ def script(code, options = {})
         path "#{lib_path}"
         gem "two"
       end
-
-      puts "success"
     RUBY
 
-    expect(out).to eq("two\nsuccess")
+    expect(out).to eq("two")
+    expect(exitstatus).to be_zero if exitstatus
 
     script <<-RUBY, :expect_err => true
       gemfile do
@@ -81,10 +80,9 @@ def script(code, options = {})
         source "file://#{gem_repo1}"
         gem "rack"
       end
-
-      puts "success"
     RUBY
 
-    expect(out).to eq("Rack's post install message\nsuccess")
+    expect(out).to eq("Rack's post install message")
+    expect(exitstatus).to be_zero if exitstatus
   end
 end