image: fix build with SELinux

The option '-xattr' for mksquashfs4 should be '-xattrs' which lead to
build failure with SELinux enabled. Add the missing 's'.

Fixes: 4baf47b9a8 ("images: squashfs: xattrs should not depend on buld host")
Signed-off-by: Daniel Golle <[email protected]>

include/image.mk

@@ -75,7 +75,7 @@ JFFS2OPTS += $(MKFS_DEVTABLE_OPT)
 SQUASHFS_BLOCKSIZE := $(CONFIG_TARGET_SQUASHFS_BLOCK_SIZE)k
 SQUASHFSOPT := -b $(SQUASHFS_BLOCKSIZE)
 SQUASHFSOPT += -p '/dev d 755 0 0' -p '/dev/console c 600 0 0 5 1'
-SQUASHFSOPT += $(if $(CONFIG_SELINUX),-xattr,-no-xattrs)
+SQUASHFSOPT += $(if $(CONFIG_SELINUX),-xattrs,-no-xattrs)
 SQUASHFSCOMP := gzip
 LZMA_XZ_OPTIONS := -Xpreset 9 -Xe -Xlc 0 -Xlp 2 -Xpb 2
 ifeq ($(CONFIG_SQUASHFS_XZ),y)