add missing STATX_ATTR_* macros omitted when statx was added

commit b817541f1c added statx and the
mask constant macros, but not the stx_attributes[_mask] ones.

include/sys/stat.h

@@ -121,6 +121,16 @@ int lchmod(const char *, mode_t);
 #define STATX_BTIME 0x800U
 #define STATX_ALL 0xfffU
 
+#define STATX_ATTR_COMPRESSED 0x4
+#define STATX_ATTR_IMMUTABLE 0x10
+#define STATX_ATTR_APPEND 0x20
+#define STATX_ATTR_NODUMP 0x40
+#define STATX_ATTR_ENCRYPTED 0x800
+#define STATX_ATTR_AUTOMOUNT 0x1000
+#define STATX_ATTR_MOUNT_ROOT 0x2000
+#define STATX_ATTR_VERITY 0x100000
+#define STATX_ATTR_DAX 0x200000
+
 struct statx_timestamp {
 	int64_t tv_sec;
 	uint32_t tv_nsec, __pad;