Add various packages and patches for build system improvements

- Introduced valgrind with a patch to respect flags and updated its configuration.
- Added Vulkan ICD loader with CMake build configuration.
- Implemented Waf build system with a custom build script and configuration.
- Included Wayland protocols with Meson build system.
- Added xcb-util-keysyms with autotools configuration.
- Introduced Yasm with multiple patches for compatibility and improvements.
- Added Yelp tools and XSL with Meson build configurations and necessary patches for POSIX compliance.

extra/itstool/0003-Fix-handling-of-untranslated-nodes.patch

@@ -0,0 +1,31 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Harald van Dijk <harald@gigawatt.nl>
+Date: Thu, 15 Jun 2023 23:18:11 +0100
+Subject: [PATCH] Fix handling of untranslated nodes
+
+If a translation is missing, get_translated returns the node it was
+called with. But ph_node when passed to get_translated is part of
+another document and cannot just be reparented, it needs to be cloned.
+The reparenting leaves things in an inconsistent state where references
+intended to refer to nodes in the original document no longer do so, and
+they may then be accessed from those references after the new document
+has already been freed.
+
+Fixes bug #36.
+---
+ itstool.in | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/itstool.in b/itstool.in
+index 8e8c657aa352..0e273b4c5bfa 100755
+--- a/itstool.in
++++ b/itstool.in
+@@ -1109,6 +1109,8 @@ class Document (object):
+                         child.replaceNode(newnode)
+                     else:
+                         repl = self.get_translated(ph_node, translations, strict=strict, lang=lang)
++                        if repl == ph_node:
++                            repl = repl.copyNode(1)
+                         child.replaceNode(repl)
+                 scan_node(child)
+         try: