sync with OpenBSD -current

lib/libva/.github/workflows/install-clang.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+set -euo pipefail
+
+if (( $# != 1 )); then
+	echo Script requires one argument - the clang version to be installed
+	exit 1
+fi
+
+if ! which $CC >/dev/null 2>&1; then
+	case $DISTRO in
+		"ubuntu-22.04") distro_name=jammy;;
+		"ubuntu-20.04") distro_name=focal;;
+		*)
+		echo "Unknown distribution $DISTRO"
+		exit 1
+	esac
+	case $1 in
+		"14" | "15") llvm_version=$1;;
+		*)
+		echo "Unknown llvm version $1"
+		exit 1
+	esac
+
+	sources="deb [trusted=yes] http://apt.llvm.org/$distro_name/ llvm-toolchain-$distro_name-$llvm_version main"
+
+	echo "clang-$llvm_version missed in the image, installing from llvm"
+	echo "$sources" | sudo tee -a /etc/apt/sources.list
+	sudo apt-get update
+	sudo apt-get install -y --no-install-recommends clang-$llvm_version
+fi
+