Take benefit from squashfs-tools 4.3 for faster test builds
Initial discussion and benchmarks: https://mailman.boum.org/pipermail/tails-dev/2015-July/009241.html
squashfs-tools 4.3 allows setting the gzip compression level. This means faster test builds.
Once our Vagrant basebox is based on Stretch, we can modify the
gzipcomp build option to use a lower gzip compression level.
- Related to #16177 (closed)