The zstd (de)compression tool may be used in post-image scripts to
compress certain elements of the final image.
In order to allow that, make host-zstd selectable in the 'Host
utilities' menu, and build the binary in addition to the library.
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
