package/swugenerator: add missing runtime dependencies

swugenerator might use openssl to encrypt files in .swu(cpio)
resulting output archive and gzip or zlib to compress the same files
but we're not sure whether build environment have or not openssl, gzip
and zlib installed so we add them as host dependencies.

Signed-off-by: Giulio Benetti <giulio.benetti+tekvox@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/swugenerator/swugenerator.mk

@@ -9,6 +9,10 @@ SWUGENERATOR_SITE = $(call github,sbabic,swugenerator,v$(SWUGENERATOR_VERSION))
 SWUGENERATOR_LICENSE = GPL-3.0
 SWUGENERATOR_LICENSE_FILES = LICENSE
 HOST_SWUGENERATOR_SETUP_TYPE = setuptools
-HOST_SWUGENERATOR_DEPENDENCIES = host-python-libconf
+HOST_SWUGENERATOR_DEPENDENCIES = \
+	host-gzip \
+	host-openssl \
+	host-python-libconf \
+	host-zstd
 
 $(eval $(host-python-package))