Change /system from ext2 to ext3

Even though the stock rom mounts /system as ext2, formatting it as ext3 will be
better.   Mounting an ext3 fs as ext2 will just ignore the journaling which
will be ok for us.  Also recovery should follow the format in the edify
scripting, so this is only for corner cases anyway.

Change-Id: I3beebc85360d714f5ce43898957bea8deaa3580f

recovery.fstab

@@ -1,7 +1,7 @@
 # mount point   fstype      device                  [device2]               [fstype2]
 
 /boot           vfat        /dev/block/mmcblk0p1
-/system         ext4        /dev/block/mmcblk0p5    NULL                    ext2
+/system         ext4        /dev/block/mmcblk0p5    NULL                    ext3
 /data           ext4        /dev/block/mmcblk0p6    NULL                    ext3
 /cache          ext4        /dev/block/mmcblk0p7    NULL                    ext3
 /emmc           vfat        /dev/block/mmcblk0p8

releasetools/encore_common.py

@@ -30,6 +30,3 @@ def load_module_from_file(module_name, filename):
     f.close()
     return module
 
-# Add vfat to the partition types
-PARTITION_TYPES['vfat'] = "EMMC"
-PARTITION_TYPES['ext2'] = "EMMC"