libxml2: upgrade 2.11.5 -> 2.12.5

License-Update: hash.c is rewritten and no longer carries a special copyright notice, but dict.c still does
(Copyright file updated to reflect that)

(From OE-Core rev: a14769d40bee751ac1dcd536789e8e346046e141)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

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

@@ -1,4 +1,4 @@
-From 3fc716357ce1372d9418dc86f24315b34d9808de Mon Sep 17 00:00:00 2001
+From 0779511838a8cbd1e0f431c22f28f286a2a37b1b 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
@@ -7,17 +7,16 @@ Add a target to install the test suite.
 
 Upstream-Status: Inappropriate
 Signed-off-by: Ross Burton <ross.burton@arm.com>
-
 ---
  Makefile.am | 10 ++++++++++
  1 file changed, 10 insertions(+)
 
 diff --git a/Makefile.am b/Makefile.am
-index 5bc4018..57d27af 100644
+index 0a49d37..1097c63 100644
 --- a/Makefile.am
 +++ b/Makefile.am
-@@ -26,6 +26,16 @@ check_PROGRAMS = \
- 	testlimits \
+@@ -27,6 +27,16 @@ check_PROGRAMS = \
+ 	testparser \
  	testrecurse
  
 +ptestdir=$(libexecdir)