fstab : Add system_img mount and use it to backup/restore system instead of normal system mount.

recovery.fstab

@@ -1,15 +1,15 @@
-/modem		    vfat		/dev/block/platform/msm_sdcc.1/by-name/modem /dev/block/platform/msm_sdcc.1/by-name/mdm	flags=backup=1;display="Modem"
-/firmware		vfat		/dev/block/platform/msm_sdcc.1/by-name/apnhlos	    flags=backup=1;subpartitionof=/modem;mounttodecrypt;fsflags=ro,context=u:object_r:firmware_file:s0
-/boot		    emmc		/dev/block/platform/msm_sdcc.1/by-name/boot         flags=backup=1;display="Kernel"
-/recovery		emmc		/dev/block/platform/msm_sdcc.1/by-name/recovery	    flags=backup=1
-/cache		    ext4		/dev/block/platform/msm_sdcc.1/by-name/cache
-/system		    ext4		/dev/block/platform/msm_sdcc.1/by-name/system       flags=backup=1
-/data		    ext4		/dev/block/platform/msm_sdcc.1/by-name/userdata	    flags=encryptable=footer;length=-16384
-/storage        ext4        /data/media/0                                       flags=display="Internal Storage";usermrf;backup=1;fsflags="bind";removable
-/efs			ext4		/dev/block/platform/msm_sdcc.1/by-name/efs		    flags=backup=1;display="EFS"
-/modemst1		emmc		/dev/block/platform/msm_sdcc.1/by-name/modemst1	    flags=backup=1;subpartitionof=/efs
-/modemst2		emmc		/dev/block/platform/msm_sdcc.1/by-name/modemst2	    flags=backup=1;subpartitionof=/efs
-/external_sd	vfat		/dev/block/mmcblk1p1 /dev/block/mmcblk1			    flags=display="Micro SDcard";storage;wipeingui;removable
-/usbstorage	    vfat		/dev/block/sda1 /dev/block/sda				        flags=display="USB Storage";storage;wipeingui;removable
-/misc		    emmc		/dev/block/platform/msm_sdcc.1/by-name/fota
-
+/modem      vfat        /dev/block/platform/msm_sdcc.1/by-name/modem    /dev/block/platform/msm_sdcc.1/by-name/mdm  flags=backup=1;display="Modem"
+/firmware   vfat        /dev/block/platform/msm_sdcc.1/by-name/apnhlos                                              flags=backup=1;subpartitionof=/modem;mounttodecrypt;fsflags=ro,context=u:object_r:firmware_file:s0
+/boot       emmc        /dev/block/platform/msm_sdcc.1/by-name/boot                                                 flags=backup=1;display="Boot Image"
+/recovery   emmc        /dev/block/platform/msm_sdcc.1/by-name/recovery                                             flags=backup=1
+/cache      ext4        /dev/block/platform/msm_sdcc.1/by-name/cache
+/system     ext4        /dev/block/platform/msm_sdcc.1/by-name/system                                               flags=backup=0
+/system_img emmc        /dev/block/platform/msm_sdcc.1/by-name/system                                               flags=display="System Image";backup=1;flashimg=0
+/data       ext4        /dev/block/platform/msm_sdcc.1/by-name/userdata                                             flags=encryptable=footer;length=-16384
+/storage    ext4        /data/media/0                                                                               flags=display="Internal Storage";usermrf;backup=1;fsflags="bind";removable
+/efs        ext4        /dev/block/platform/msm_sdcc.1/by-name/efs                                                  flags=backup=1;display="EFS"
+/modemst1   emmc        /dev/block/platform/msm_sdcc.1/by-name/modemst1                                             flags=backup=1;subpartitionof=/efs
+/modemst2   emmc        /dev/block/platform/msm_sdcc.1/by-name/modemst2                                             flags=backup=1;subpartitionof=/efs
+/sdcard1    vfat        /dev/block/mmcblk1p1 /dev/block/mmcblk1                                                     flags=display="Micro SDcard";storage;wipeingui;removable
+/usb_otg    vfat        /dev/block/sda1 /dev/block/sda                                                              flags=display="USB Storage";storage;wipeingui;removable
+/misc       emmc        /dev/block/platform/msm_sdcc.1/by-name/fota