Enable fs-checking on /boot

- Set the fsck flag to non-zero to make sure /boot is fsck'd, if needed.

Change-Id: I8eec422700da3b777cfc01a3d568c19b715e7b4b
diff --git a/fstab.emmc b/fstab.emmc
index 9957a31..8b8e877 100644
--- a/fstab.emmc
+++ b/fstab.emmc
@@ -1,4 +1,4 @@
 PARTUUID=02f36a4f-4562-46b2-bbec-bfc1682f9e92 / ext4 noatime,defaults 0 1
 PARTUUID=b3c678b9-3004-4e30-87dc-ed33fbf4dbfd /home ext4 noatime,nosuid,nodev,defaults,x-systemd.makefs 0 3
-PARTUUID=0f94c91b-1d90-492f-ab86-6952303b214e /boot ext2 noatime,defaults 0 0
+PARTUUID=0f94c91b-1d90-492f-ab86-6952303b214e /boot ext2 noatime,defaults 0 2
 tmpfs /var/log tmpfs defaults 0 0