Update Sizzle: fixes test fails in selector module in IE9/Opera

diff --git a/src/sizzle b/src/sizzle
index 3db4d268c87f9796fac69e581dab22b25024e78d..f6e89959ff12fd3fdb6fde162f275f35b3c0acb1 160000 (submodule)
--- a/src/sizzle
+++ b/src/sizzle
@@ -1 +1 @@
-Subproject commit 3db4d268c87f9796fac69e581dab22b25024e78d
+Subproject commit f6e89959ff12fd3fdb6fde162f275f35b3c0acb1