Fix the path to ostree BootLoaderSpec filename

Starting ostree v.2018.7 (commit 9f48e212) the BLS specification has
been changed to 'ostree-$NUM-$OSNAME.conf'.

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

scripts/setup-uefi-bootloader.sh

@@ -12,7 +12,7 @@ sysroot=${ROOTDIR}
 
 osname=$1
 
-bootconf=$sysroot/boot/loader/entries/ostree-${osname}-0.conf
+bootconf=$sysroot/boot/loader/entries/ostree-1-${osname}.conf
 
 if [ ! -f "$bootconf" ]; then
     echo "OStree setup is not available!"
@@ -45,5 +45,5 @@ umount $ostree/etc/machine-id
 # Copy config, kernel and initrd
 # Change the name of config to unify with patch added in T4469
 rsync -Pav $sysroot/boot/ostree $sysroot/boot/efi/
-cp $sysroot/boot/loader/entries/ostree-${osname}-0.conf $sysroot/boot/efi/loader/entries/ostree-0-1.conf
+cp $bootconf $sysroot/boot/efi/loader/entries/ostree-0-1.conf
 rm -f $sysroot/boot/efi/loader/loader.conf