package/libselinux: enable kernel selinux support for squashfs images

If BR2_TARGET_ROOTFS_SQUASHFS is selected, enable the following kernel options:
  - CONFIG_SQUASHFS_XATTR

Signed-off-by: Adam Duskett <Aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libselinux/libselinux.mk

@@ -127,6 +127,8 @@ define LIBSELINUX_LINUX_CONFIG_FIXUPS
 		$(call KCONFIG_ENABLE_OPT,CONFIG_F2FS_FS_SECURITY))
 	$(if $(BR2_TARGET_ROOTFS_JFFS2),
 		$(call KCONFIG_ENABLE_OPT,CONFIG_JFS_SECURITY))
+	$(if $(BR2_TARGET_ROOTFS_SQUASHFS),
+		$(call KCONFIG_ENABLE_OPT,CONFIG_SQUASHFS_XATTR))
 endef
 
 $(eval $(generic-package))