Sizzle: fixes test fails in IE6/7

diff --git a/src/sizzle b/src/sizzle
index deb73a18e2e80d8e1a482f1d557b5e8eab545213..3c6916332ea21ffed7ef81921e9eaa57fa2d98a6 160000 (submodule)
--- a/src/sizzle
+++ b/src/sizzle
@@ -1 +1 @@
-Subproject commit deb73a18e2e80d8e1a482f1d557b5e8eab545213
+Subproject commit 3c6916332ea21ffed7ef81921e9eaa57fa2d98a6