opkg: Do not delete the wrapper in the patch

patches/openwrt/branding/0008-opkg-add-opkg_wrapper.patch

@@ -25,6 +25,18 @@ index 4f89d9ec6c..63302a06ed 100644
    ifneq ($(CONFIG_SIGNED_PACKAGES),)
  	echo "option check_signature" >> $(1)/etc/opkg.conf
    endif
+diff --git a/package/system/opkg/files/opkg_wrapper.sh b/package/system/opkg/files/opkg_wrapper.sh
+new file mode 100755
+index 0000000..654b23d
+--- /dev/null
++++ b/package/system/opkg/files/opkg_wrapper.sh
+@@ -0,0 +1,6 @@
++#!/bin/sh
++if which opkg-pkgupdate-wrapper.sh >/dev/null 2>&1; then
++    exec opkg-pkgupdate-wrapper.sh "$@"
++else
++    exec /bin/opkg-cl "$@"
++fi
 -- 
 2.20.1