ohos-image.bbclass: Export squashfs rootfs by default

This can help in development to play with deltas on squashfs images.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-ohos-core/classes/ohos-image.bbclass

@@ -45,6 +45,8 @@ def extlinux_boot_files(d):
 # wic configuration with support for system update partition setup
 #
 
+IMAGE_FSTYPES_append = " squashfs"
+
 WKS_FILE_raspberrypi4-64 ?= "x-raspberrypi.wks.in"
 
 WKS_FILE_seco-intel-b68 ?= "x-efi-systemd-microcode.wks.in"