Merge pull request #75450 from KoviRobi/fix-wrap-gapps-hook-shell-quoting

wrapGAppsHook: don't add empty variables (see also #75443)

pkgs/build-support/setup-hooks/wrap-gapps-hook.sh

@@ -42,7 +42,9 @@ wrapGAppsHook() {
   fi
 
   for v in ${wrapPrefixVariables:-} GST_PLUGIN_SYSTEM_PATH_1_0 GI_TYPELIB_PATH GRL_PLUGIN_PATH; do
-    gappsWrapperArgs+=(--prefix "$v" : "${!v}")
+    if [ -n "${!v}" ]; then
+      gappsWrapperArgs+=(--prefix "$v" : "${!v}")
+    fi
   done
 
   if [[ -z "${dontWrapGApps:-}" ]]; then