Fix WIP grub symlink path depth (3 levels, not 4)

The symlink from recipes/wip/services/grub was using ../../../../local/
which goes above the repo root. Fixed to ../../../local/ which correctly
resolves from recipes/wip/services/ to local/recipes/core/grub.

local/scripts/apply-patches.sh

@@ -137,7 +137,7 @@ if [ -d "recipes/wip/services/grub" ] && [ ! -L "recipes/wip/services/grub" ]; t
     rm -rf "recipes/wip/services/grub"
 fi
 if [ ! -e "recipes/wip/services/grub" ]; then
-    symlink "../../../../local/recipes/core/grub" "recipes/wip/services/grub"
+    symlink "../../../local/recipes/core/grub" "recipes/wip/services/grub"
 fi
 
 # Wayland additions

recipes/wip/services/grub

@@ -1 +1 @@
-../../../../local/recipes/core/grub
+../../../local/recipes/core/grub