fstab.common: adding options for userdata partition to enable FBE

according to the document here:
    https://source.android.com/security/encryption/file-based

Test: boot up db845c with android-5.4 and android-mainline kernels, and tested with vts-kernel -m VtsKernelEncryptionTest

Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
Change-Id: I6ad25b5fef31bef77893f6d5e267568489116fae
diff --git a/fstab.common b/fstab.common
index ad29337..b23e7f8 100644
--- a/fstab.common
+++ b/fstab.common
@@ -2,5 +2,5 @@
 #<src>                  <mnt_point>         <type>    <mnt_flags and options>                              <fs_mgr_flags>
 # The filesystem that contains the filesystem checker binary (typically /system) cannot
 # specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
-/dev/block/platform/soc@0/1d84000.ufshc/by-name/userdata /data		ext4	discard,noauto_da_alloc,data=ordered,user_xattr,barrier=1	wait,formattable
+/dev/block/platform/soc@0/1d84000.ufshc/by-name/userdata /data		ext4	discard,noatime,noauto_da_alloc,data=ordered,user_xattr,barrier=1,inlinecrypt	wait,formattable,fileencryption=aes-256-xts:aes-256-cts:v2+inlinecrypt_optimized
 /dev/block/by-name/metadata	/metadata	ext4	noatime,nosuid,nodev,discard					wait,formattable