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/libglvnd/libglvnd.toml

@@ -0,0 +1,36 @@
+[build]
+type = "meson"
+
+[alternatives]
+provides = [ "libgl", "libegl", "libgles" ]
+
+[build.flags]
+build_dir = "build"
+configure = ["-Dgles1=false"]
+skip_tests = true
+
+[dependencies]
+build = [
+    "libxext",
+    "libx11",
+    "xorgproto",
+    "python",
+    "meson",
+]
+runtime = [ "libxext", "mesa", "opengl-driver" ]
+
+[package]
+description = "The GL Vendor-Neutral Dispatch library"
+homepage = "https://gitlab.freedesktop.org/glvnd/libglvnd"
+license = [
+    "MIT",
+    "BSD-1-Clause",
+    "BSD-3-Clause",
+]
+name = "libglvnd"
+version = "1.7.0"
+
+[[source]]
+extract_dir = "$name-$version"
+sha256 = "2b6e15b06aafb4c0b6e2348124808cbd9b291c647299eaaba2e3202f51ff2f3d"
+url = "https://gitlab.freedesktop.org/glvnd/libglvnd/-/archive/v$version/libglvnd-v$version.tar.gz"