fstab.shamu: Mark cache and userdata as "formattable"

Mark cache and userdata as formattable partitions, so that init/fs_mgr
format them during powerup if they are blank.

Bug: 20082763

Change-Id: I6368a667d6535cf4258f616848a19ddc34a4fba6
diff --git a/fstab.shamu b/fstab.shamu
index 95b0735..4a9989a 100644
--- a/fstab.shamu
+++ b/fstab.shamu
@@ -4,8 +4,8 @@
 #
 #<src>                                                <mnt_point>  <type>  <mnt_flags and options>                     <fs_mgr_flags>
 /dev/block/platform/msm_sdcc.1/by-name/system         /system      ext4    ro,barrier=1                                wait
-/dev/block/platform/msm_sdcc.1/by-name/userdata    /data        ext4    rw,nosuid,nodev,noatime,nodiratime,noauto_da_alloc,nobarrier    wait,check,forceencrypt=/dev/block/platform/msm_sdcc.1/by-name/metadata
-/dev/block/platform/msm_sdcc.1/by-name/cache       /cache       ext4    rw,noatime,nosuid,nodev,barrier=1,data=ordered   wait,check
+/dev/block/platform/msm_sdcc.1/by-name/userdata    /data        ext4    rw,nosuid,nodev,noatime,nodiratime,noauto_da_alloc,nobarrier    wait,check,formattable,forceencrypt=/dev/block/platform/msm_sdcc.1/by-name/metadata
+/dev/block/platform/msm_sdcc.1/by-name/cache       /cache       ext4    rw,noatime,nosuid,nodev,barrier=1,data=ordered   wait,check,formattable
 /dev/block/platform/msm_sdcc.1/by-name/modem       /firmware    ext4    ro,barrier=1,context=u:object_r:firmware_file:s0    wait
 /dev/block/platform/msm_sdcc.1/by-name/persist     /persist     ext4    rw,nosuid,nodev,barrier=1                      wait,check
 /dev/block/platform/msm_sdcc.1/by-name/boot         /boot           emmc    defaults                                                        defaults