dracut-initramfs-restore.sh: try to mount /boot

This is very useful when /boot has the "noauto" option.

Thanks to Igor Filakhtov

dracut-initramfs-restore.sh

@@ -14,6 +14,8 @@ SKIP="$dracutbasedir/skipcpio"
 
 [[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id
 
+mount -o ro /boot &>/dev/null
+
 if [[ $MACHINE_ID ]] && [[ -d /boot/${MACHINE_ID} || -L /boot/${MACHINE_ID} ]] ; then
     IMG="/boot/${MACHINE_ID}/${KERNEL_VERSION}/initrd"
 fi
@@ -22,6 +24,7 @@ fi
 cd /run/initramfs
 
 [ -f .need_shutdown -a -f "$IMG" ] || exit 1
+
 if $SKIP "$IMG" | zcat | cpio -id --no-absolute-filenames --quiet >/dev/null; then
     rm -f -- .need_shutdown
 elif $SKIP "$IMG" | xzcat | cpio -id --no-absolute-filenames --quiet >/dev/null; then