raptor2: backport a fix to build with libxml2-2.11

* fixes:
  ../../raptor2-2.0.16/src/raptor_libxml.c:256:12: error: 'xmlEntity' {aka 'struct _xmlEntity'} has no member named 'checked'
  256 |     if(!ret->checked)
      |            ^~
  ../../raptor2-2.0.16/src/raptor_libxml.c:257:10: error: 'xmlEntity' {aka 'struct _xmlEntity'} has no member named 'checked'
  257 |       ret->checked = 1;
      |          ^~

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/raptor2/raptor2/0001-Remove-the-access-to-entities-checked-private-symbol.patch

@@ -0,0 +1,34 @@
+From da171e12d961b41b89196627ef5e5baae1e637ce Mon Sep 17 00:00:00 2001
+From: David Anes <david.anes@suse.com>
+Date: Thu, 4 May 2023 11:54:02 +0200
+Subject: [PATCH] Remove the access to entities 'checked' private symbol for
+ libxml2 2.11.0
+
+Since version 2.11.0, some private symbols that were never intended
+as public API/ABI have been removed from libxml2, therefore the field
+'checked' is no longer present and raptor fails to build in this
+scenario.
+
+Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
+Upstream-Status: Backport [https://github.com/dajobe/raptor/commit/ac914399b9013c54572833d4818e6ce008136dc9]
+---
+ src/raptor_libxml.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/raptor_libxml.c b/src/raptor_libxml.c
+index 538c2c8..8bcee13 100644
+--- a/src/raptor_libxml.c
++++ b/src/raptor_libxml.c
+@@ -246,10 +246,11 @@ raptor_libxml_getEntity(void* user_data, const xmlChar *name)
+     
+     ret->owner = 1;
+ 
+-#if LIBXML_VERSION >= 20627
++#if LIBXML_VERSION >= 20627 && LIBXML_VERSION < 21100
+     /* Checked field was released in 2.6.27 on 2006-10-25
+      * http://git.gnome.org/browse/libxml2/commit/?id=a37a6ad91a61d168ecc4b29263def3363fff4da6
+      *
++     * and was later removed in version 2.11.0
+      */
+ 
+     /* Mark this entity as having been checked - never do this again */

meta-oe/recipes-support/raptor2/raptor2_2.0.16.bb

@@ -11,6 +11,7 @@ DEPENDS = "libxml2 libxslt curl yajl"
 
 SRC_URI = " \
     http://download.librdf.org/source/${BPN}-${PV}.tar.gz \
+    file://0001-Remove-the-access-to-entities-checked-private-symbol.patch \
 "
 SRC_URI[sha256sum] = "089db78d7ac982354bdbf39d973baf09581e6904ac4c92a98c5caadb3de44680"