libtar: support backing up and restoring new Android user.* xattr

Support for backing up and restoring user.default, user.inode_cache, and
user.inode_code_cache xattrs introduced in Android 7.x

Change-Id: I6e0aa7fc9cd30ed004ef28ebb58d60a82e518123
diff --git a/twrpTar.cpp b/twrpTar.cpp
index fa836fd..3911733 100644
--- a/twrpTar.cpp
+++ b/twrpTar.cpp
@@ -55,9 +55,9 @@
 
 #ifdef TW_INCLUDE_FBE
 #include "crypto/ext4crypt/ext4crypt_tar.h"
-#define TWTAR_FLAGS TAR_GNU | TAR_STORE_SELINUX | TAR_STORE_POSIX_CAP |TAR_STORE_EXT4_POL
+#define TWTAR_FLAGS TAR_GNU | TAR_STORE_SELINUX | TAR_STORE_POSIX_CAP | TAR_STORE_ANDROID_USER_XATTR |TAR_STORE_EXT4_POL
 #else
-#define TWTAR_FLAGS TAR_GNU | TAR_STORE_SELINUX | TAR_STORE_POSIX_CAP
+#define TWTAR_FLAGS TAR_GNU | TAR_STORE_SELINUX | TAR_STORE_POSIX_CAP | TAR_STORE_ANDROID_USER_XATTR
 #endif
 
 using namespace std;