Patch 300-CVE-2015-8370.patch was added without proper rebasing on the version used by OpenWrt, make it apply and refresh the patch to fix compilation. Fixes:7e73e9128f("grub2: Fix CVE-2015-8370") Signed-off-by: Jo-Philipp Wich <jo@mein.io> (cherry picked from commit9ffbe84ea4)