Fix #10832 (this time with tests): jQuery.contains in SVG

diff --git a/src/sizzle b/src/sizzle
index 7bef9ba3b2be83595ae38c41de0af9a4809cfb69..21c1cd6f10cdbbcb7712cdfd50a17f419e9b02b7 160000 (submodule)
--- a/src/sizzle
+++ b/src/sizzle
@@ -1 +1 @@
-Subproject commit 7bef9ba3b2be83595ae38c41de0af9a4809cfb69
+Subproject commit 21c1cd6f10cdbbcb7712cdfd50a17f419e9b02b7