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/rav1e/rav1e.toml

@@ -0,0 +1,32 @@
+[build]
+type = "custom"
+
+[dependencies]
+build = [
+    "cargo-c",
+    "nasm",
+    "cargo",
+]
+runtime = [
+    "libcxx",
+    "libunwind",
+    "glibc",
+]
+
+[[manual_sources]]
+url = "https://github.com/xiph/rav1e/releases/download/v$version/Cargo.lock"
+
+[[manual_sources]]
+file = "build.sh"
+
+[package]
+description = "AV1 encoder focused on speed and safety"
+homepage = "https://github.com/xiph/rav1e/"
+license = "BSD-2-Clause"
+name = "rav1e"
+version = "0.8.1"
+
+[[source]]
+extract_dir = "$name-$version"
+post_extract = ["cp -f ../Cargo.lock ./Cargo.lock"]
+url = "https://github.com/xiph/rav1e.git#1fe82de02510767539e89b2ee6fa846920ae2686"