File ostree-grub2-location.patch of Package libostree

--- a/src/boot/grub2/grub2-15_ostree
+++ b/src/boot/grub2/grub2-15_ostree
@@ -47,7 +47,7 @@ set -e
 # it's a lot better than reimplementing the config-generating bits of
 # OSTree in shell script.
 
-. /usr/share/grub/grub-mkconfig_lib
+. /usr/share/grub2/grub-mkconfig_lib
 
 DEVICE=${GRUB_DEVICE_BOOT:-${GRUB_DEVICE}}