clearfog: RAUC actually need `mksquashfs` on host, too

Change-Id: I07ecf9fb2bcfffc00134bf4589ae5bcebaa51d87
diff --git a/configs/czechlight_clearfog_defconfig b/configs/czechlight_clearfog_defconfig
index f0ff630..fce8742 100644
--- a/configs/czechlight_clearfog_defconfig
+++ b/configs/czechlight_clearfog_defconfig
@@ -54,4 +54,5 @@
 BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot-spl.kwb"
 BR2_PACKAGE_HOST_GENIMAGE=y
 BR2_PACKAGE_HOST_RAUC=y
+BR2_PACKAGE_HOST_SQUASHFS=y
 CZECHLIGHT_NETCONF=y