syscalls test data

ext4 image

Created without the 64bit feature with:

• truncate -s 1M simple_ext4.img
• mkfs.ext4 simple_ext4.img -O ^64bit
• sudo mkdir /mnt/tmp
• sudo mount -oloop simple_ext4.img /mnt/tmp
• sudo cp hello_world.txt /mnt/tmp/
• sudo umount /mnt/tmp
• e2fsck -f simple_ext4.img
• resize2fs -M simple_ext4.img (counting number of reported blocks)
• truncate -o --size NN simple_ext4.img (where NN=number of blocks above)