add __GL_DXVK_OPTIMIZATIONS=1 in runlib for NVIDIA

data_from_portwine/scripts/runlib

@@ -155,6 +155,7 @@ if [ ! -z "${PW_NVIDIA}" ] && [ "${check_optimus_manager}" != "intel" ]; then
     export __GL_SHADER_DISK_CACHE=1
     export __GL_SHADER_DISK_CACHE_SIZE=1000000000
     export __GL_THREADED_OPTIMIZATIONS=1
+    export __GL_DXVK_OPTIMIZATIONS=1
 else
     export DRI_PRIME=1
     export vblank_mode=0