Disable path tests where dart:io is not available.

pkg/pkg.status

Index: pkg/pkg.status
diff --git a/pkg/pkg.status b/pkg/pkg.status
index 7eab50cb1c0be40cf91e8386ec4681f942842ee7..c3223fba095480420e4066634e3cf56cc3aafd96 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -16,11 +16,13 @@ fixnum/test/int_64_vm_test: Skip
 [ $compiler == dart2js || $compiler == dart2dart ]
 http/test/*: Skip
 oauth2/test/*: Skip
+path/test/*: Skip
 
 # Skip tests that use local file access if we're running in any browser
 [ $runtime == opera || $runtime == ff || $runtime == ie9 || $runtime == dartium || $runtime == chrome || $runtime == safari || $runtime == drt ]
 http/test/*: Skip
 oauth2/test/*: Skip
+path/test/*: Skip
 intl/test/date_time_format_file_even_test: Skip
 intl/test/date_time_format_file_odd_test: Skip
 intl/test/find_default_locale_standalone_test: Skip