hlte-common: fix typo on fstab

We should ask kernel to mount with "defaults" not "default".

This fixes some filesystems such as EXT4 not mounting on external OTG storage.

Also fix some whitespaces to match grid with other lines.

Change-Id: Ie11dd8a2917af78f35cd19b32940ab9343e6ed73
Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>