utils/tar: Default to acl and xattr support if it's core default

If we've enable POSIX ACL's and XATTR support as the default, then
make tar build with such support by default as well.

Signed-off-by: Daniel Dickinson <lede@daniel.thecshore.com>

utils/tar/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=tar
 PKG_VERSION:=1.29
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=@GNU/$(PKG_NAME)
@@ -39,10 +39,12 @@ define Package/tar/config
 	if PACKAGE_tar
 		config PACKAGE_TAR_POSIX_ACL
 			bool "tar: Enable POSIX ACL support"
+			default y if USE_FS_ACL_ATTR
 			default n
 
 		config PACKAGE_TAR_XATTR
 			bool "tar: Enable extended attribute (xattr) support"
+			default y if USE_FS_ACL_ATTR
 			default n
 
 		config PACKAGE_TAR_GZIP