image_types: declare support for wic.zst
Declare images in wic.zst format as supported, as bmaptool now supports
zstd:
https://github.com/intel/bmap-tools/commit/
1b8437d58447d3796dc11fd0f2c62bec5746e5d6
Given the very fast decompression speed of zstd over, for example, gzip,
writing images with bmaptool can provide big write speed improvements
when decompression speed is the limiting factor (especially with very
sparse images).
Signed-off-by: Diego Rondini <diego.rondini@kynetics.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
