libxml2: upgrade 2.13.3 -> 2.13.6

Handle CVE-2025-24928, CVE-2024-56171 and CVE-2025-27113.

(From OE-Core rev: 13929d3126572d3024afd58a914592e8e6ea8457)

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-core/libxml/libxml2/install-tests.patch

@@ -1,4 +1,4 @@
-From 0779511838a8cbd1e0f431c22f28f286a2a37b1b Mon Sep 17 00:00:00 2001
+From 8c1054eacb430472068f21e4840749c384e8e866 Mon Sep 17 00:00:00 2001
 From: Ross Burton <ross.burton@arm.com>
 Date: Mon, 5 Dec 2022 17:02:32 +0000
 Subject: [PATCH] add yocto-specific install-ptest target
@@ -12,7 +12,7 @@ Signed-off-by: Ross Burton <ross.burton@arm.com>
  1 file changed, 10 insertions(+)
 
 diff --git a/Makefile.am b/Makefile.am
-index 0a49d37..1097c63 100644
+index 4cb9a5c..8adcd7e 100644
 --- a/Makefile.am
 +++ b/Makefile.am
 @@ -27,6 +27,16 @@ check_PROGRAMS = \

meta/recipes-core/libxml/libxml2_2.13.6.bb

@@ -19,7 +19,7 @@ SRC_URI += "http://www.w3.org/XML/Test/xmlts20130923.tar;subdir=${BP};name=testt
            file://install-tests.patch \
            "
 
-SRC_URI[archive.sha256sum] = "0805d7c180cf09caad71666c7a458a74f041561a532902454da5047d83948138"
+SRC_URI[archive.sha256sum] = "f453480307524968f7a04ec65e64f2a83a825973bcd260a2e7691be82ae70c96"
 SRC_URI[testtar.sha256sum] = "c6b2d42ee50b8b236e711a97d68e6c4b5c8d83e69a2be4722379f08702ea7273"
 
 # Disputed as a security issue, but fixed in d39f780