[glibc] linux: Add STATX_MNT_ID_UNIQUE definition to generic statx

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=0d0726e4eb7493ba46b597954348cb5029c2bc13

commit 0d0726e4eb7493ba46b597954348cb5029c2bc13
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Fri Oct 3 16:38:56 2025 -0300

    linux: Add STATX_MNT_ID_UNIQUE definition to generic statx
    
    The commit 88a2cf6c4bab6e94a65e9c0db8813709372e9180 added
    STATX_MNT_ID_UNIQUE on the statx-generic.h without updating the
    generic statx struct.

Diff:
---
 io/bits/types/struct_statx.h | 4 +++-
 io/tst-statx.c               | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/io/bits/types/struct_statx.h b/io/bits/types/struct_statx.h
index a325edbd11..36d9737796 100644
--- a/io/bits/types/struct_statx.h
+++ b/io/bits/types/struct_statx.h
@@ -49,7 +49,9 @@ struct statx
   __uint32_t stx_rdev_minor;
   __uint32_t stx_dev_major;
   __uint32_t stx_dev_minor;
-  __uint64_t __statx_pad2[14];
+  __uint64_t stx_mnt_id;
+  __uint64_t __spare2;
+  __uint64_t __statx_pad2[12];
 };
 
 #endif /* __statx_defined */
diff --git a/io/tst-statx.c b/io/tst-statx.c
index 989ce91dcc..1f7bafb01a 100644
--- a/io/tst-statx.c
+++ b/io/tst-statx.c
@@ -37,7 +37,7 @@ _Static_assert (offsetof (struct statx, stx_nlink) == 16, "statx nlink");
 _Static_assert (offsetof (struct statx, stx_ino) == 32, "statx ino");
 _Static_assert (offsetof (struct statx, stx_atime) == 64, "statx atime");
 _Static_assert (offsetof (struct statx, stx_rdev_major) == 128, "statx rdev");
-_Static_assert (offsetof (struct statx, __statx_pad2) == 144, "statx pad2");
+_Static_assert (offsetof (struct statx, __statx_pad2) == 160, "statx pad2");
 
 #include "statx_generic.c"