Avoid flaking in message_extraction tests by doing everything in a temp directory

pkg/pkg.status

Index: pkg/pkg.status
diff --git a/pkg/pkg.status b/pkg/pkg.status
index 0ffbc6ea23c81c056452e59d2bb79cd55ca460af..a6820cc87769b1d0e900a0c9af5c1f542b051c1a 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -308,9 +308,6 @@ polymer/test/custom_event_test: Pass, Crash # 14360
 [ $compiler == none && ( $runtime == dartium || $runtime == drt ) && $checked ]
 polymer/test/custom_event_test: Skip # http://dartbug.com/15517
 
-[ $runtime == vm ]
-intl/test/message_extraction/message_extraction_test: Skip # Issue 17130
-
 # Skip tests on the VM if the package depends on dart:html
 custom_element: Skip
 template_binding: Skip