[raspbian] fix raspbian image expanding

[simonlingoogle]

Raspbian image expanding by 1024MB was never successful in the Github Actions.

This commit uses ryankurte/docker-rpi-emu#21 to fix this issue.

Question:

#532 failed on raspbian-check workflow constantly and requires this PR to pass all checks. Are we going to wait for ryankurte/docker-rpi-emu#21 to be merged? Or can we merge this commit using ryankurte/docker-rpi-emu#21 rather than docker-rpi-emu master?

FYI:

Failed expanding output

+ sudo ./expand.sh /home/runner/.cache/tools/images/2018-04-18-raspbian-stretch-lite.img 1024
...
Number  Start   End     Size    Type     File system  Flags
 1      4194kB  49.4MB  45.2MB  primary  fat32        lba
 2      50.3MB  1862MB  1812MB  primary  ext4

Making new partition from 50.3MB to 2936MB
e2fsck 1.44.1 (24-Mar-2018)
e2fsck: need terminal for interactive repairs
resize2fs 1.44.1 (24-Mar-2018)
Please run 'e2fsck -f /dev/loop1' first.

Successful expanding output

+ sudo ./expand.sh /home/runner/.cache/tools/images/2018-04-18-raspbian-stretch-lite.img 1024
...
Number  Start   End     Size    Type     File system  Flags
 1      4194kB  49.4MB  45.2MB  primary  fat32        lba
 2      50.3MB  1862MB  1812MB  primary  ext4

Making new partition from 50.3MB to 2936MB
rootfs: 39315/110656 files (0.1% non-contiguous), 256882/442368 blocks
resize2fs 1.44.1 (24-Mar-2018)
Resizing the filesystem on /dev/loop1 to 704512 (4k) blocks.
The filesystem on /dev/loop1 is now 704512 (4k) blocks long.

[simonlingoogle]

This PR is no longer necessary since ryankurte/docker-rpi-emu#21 has been merged.