Change /misc partion to /OTA

Change-Id: Iee7070ebd8c370820acdd25b713b6f32efda1168

recovery.fstab

@@ -8,3 +8,4 @@
 /efs		ext4	/dev/block/bootdevice/by-name/EFS	flags=backup=1;display="EFS"
 /external_sd	vfat	/dev/block/mmcblk0p1 /dev/block/mmcblk0	flags=display="Micro SDcard";storage;wipeingui;removable
 /usb-otg	vfat	/dev/block/sde1 /dev/block/sde		flags=display="USB-OTG";storage;wipeingui;removable
+/misc		emmc	/dev/block/bootdevice/by-name/OTA