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/yelp-tools/yelp-tools.toml

@@ -0,0 +1,28 @@
+[build]
+type = "meson"
+
+[build.flags]
+build_dir = "build"
+configure = ["-Dhelp=true"]
+
+[dependencies]
+build = ["meson"]
+runtime = [
+    "yelp-xsl",
+    "python-lxml",
+    "itstool",
+    "libxml215",
+    "docbook-xsl",
+    "mallard-ducktype",
+]
+
+[package]
+description = "Collection of tools for building and converting documentation"
+homepage = "https://gitlab.gnome.org/GNOME/yelp-tools"
+license = "GPL-2.0-or-Later"
+name = "yelp-tools"
+version = "42.1"
+
+[[source]]
+extract_dir = "$name-$version"
+url = "https://gitlab.gnome.org/GNOME/yelp-tools.git#fe5ff72ca46fba425143e5dc67d660703c86145f"