Upgrade libxml2 to c41bc10da31a4a4e5416270110b6d1b79606cad1

Test: make
Change-Id: Ic025f2f5cd8dbadc8bf3a446b941c403931de3f1
diff --git a/debugXML.c b/debugXML.c
index 7a2ca47..3f28c67 100644
--- a/debugXML.c
+++ b/debugXML.c
@@ -3418,6 +3418,5 @@
 }
 
 #endif /* LIBXML_XPATH_ENABLED */
-#define bottom_debugXML
-#include "elfgcchack.h"
+
 #endif /* LIBXML_DEBUG_ENABLED */