fs/iso9660: switch from cdrkit to xorriso to build ISO9660 images

In order to add support for EFI-compatible ISO9660 images in future
patches, this commit switch the ISO9660 logic to use xorriso instead of
cdrkit. Indeed the genimageiso tool from cdrkit doesn't have the
--efi-boot option needed to generate an image compatible with EFI BIOS.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
[yann.morin.1998@free.fr: drop superfluous tool name from variable]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

fs/iso9660/iso9660.mk

@@ -24,7 +24,7 @@
 
 ROOTFS_ISO9660_BOOT_MENU = $(call qstrip,$(BR2_TARGET_ROOTFS_ISO9660_BOOT_MENU))
 
-ROOTFS_ISO9660_DEPENDENCIES = host-cdrkit linux
+ROOTFS_ISO9660_DEPENDENCIES = host-xorriso linux
 
 ifeq ($(BR2_TARGET_ROOTFS_INITRAMFS),y)
 ROOTFS_ISO9660_USE_INITRD = YES
@@ -52,7 +52,7 @@ define ROOTFS_ISO9660_MKZFTREE
 		$(ROOTFS_ISO9660_TMP_TARGET_DIR)
 endef
 ROOTFS_ISO9660_PRE_GEN_HOOKS += ROOTFS_ISO9660_MKZFTREE
-ROOTFS_ISO9660_GENISOIMAGE_OPTS += -z
+ROOTFS_ISO9660_OPTS += -z
 else
 ROOTFS_ISO9660_TMP_TARGET_DIR = $(TARGET_DIR)
 endif
@@ -129,9 +129,9 @@ ROOTFS_ISO9660_PRE_GEN_HOOKS += ROOTFS_ISO9660_DISABLE_EXTERNAL_INITRD
 endif # ROOTFS_ISO9660_USE_INITRD
 
 define ROOTFS_ISO9660_CMD
-	$(HOST_DIR)/bin/genisoimage -J -R -b $(ROOTFS_ISO9660_BOOT_IMAGE) \
+	$(HOST_DIR)/bin/xorriso -as mkisofs -J -R -b $(ROOTFS_ISO9660_BOOT_IMAGE) \
 		-no-emul-boot -boot-load-size 4 -boot-info-table \
-		$(ROOTFS_ISO9660_GENISOIMAGE_OPTS) \
+		$(ROOTFS_ISO9660_OPTS) \
 		-o $@ $(ROOTFS_ISO9660_TMP_TARGET_DIR)
 endef