test: mark test-signal-unregister as flaky

This test just failed on Ubuntu in Jenkins, for a change that is 100% Windows-specific. Reviewed-By: Joao Reis <[email protected]> PR-URL: nodejs#25750
OpenFPGAduino · lizhizhou · Feb 16, 2015 · Feb 16, 2015 · Feb 16, 2015 · Feb 17, 2015
commit cf435d55db1900b996e069738673ce1ed4cee180
diff --git a/test/simple/simple.status b/test/simple/simple.status
@@ -10,6 +10,7 @@ test-timers-first-fire            : PASS,FLAKY
 test-http-pipeline-flood          : PASS,FLAKY
 
 [$system==linux]
+test-signal-unregister            : PASS,FLAKY
 
 [$system==macos]
 test-fs-watch                     : PASS,FLAKY