Add explicit enable step to vulkan script dir

scripts.d/50-vulkan/99-enable.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+SCRIPT_SKIP="1"
+
+ffbuild_enabled() {
+    [[ $ADDINS_STR == *4.4* ]] && return -1
+    return 0
+}
+
+ffbuild_dockerbuild() {
+    return 0
+}