sync code with last improvements from OpenBSD

lib/mesa/.gitlab-ci/common/start-x.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+set -ex
+
+_XORG_SCRIPT="/xorg-script"
+_FLAG_FILE="/xorg-started"
+
+echo "touch ${_FLAG_FILE}; sleep 100000" > "${_XORG_SCRIPT}"
+if [ "x$1" != "x" ]; then
+    export LD_LIBRARY_PATH="${1}/lib"
+    export LIBGL_DRIVERS_PATH="${1}/lib/dri"
+fi
+xinit /bin/sh "${_XORG_SCRIPT}" -- /usr/bin/Xorg vt45 -noreset -s 0 -dpms -logfile /Xorg.0.log &
+
+# Wait for xorg to be ready for connections.
+for i in 1 2 3 4 5; do
+    if [ -e "${_FLAG_FILE}" ]; then
+        break
+    fi
+    sleep 5
+done