fix(ci): gate statx flags import

Author: a-shannon

src/backend/libc/fs/syscalls.rs

@@ -49,6 +49,15 @@ use crate::fs::SealFlags;
     target_os = "wasi",
 )))]
 use crate::fs::StatFs;
+#[cfg(all(
+    linux_kernel,
+    any(
+        target_pointer_width = "32",
+        target_arch = "mips64",
+        target_arch = "mips64r6"
+    )
+))]
+use crate::fs::StatxFlags;
 #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
 use crate::fs::Timestamps;
 #[cfg(not(any(
@@ -91,7 +100,7 @@ use {crate::fs::Advice, core::num::NonZeroU64};
 use {crate::fs::XattrFlags, core::mem::size_of, core::ptr::null_mut};
 #[cfg(linux_kernel)]
 use {
-    crate::fs::{ResolveFlags, Statx, StatxFlags, StatxRequestFlags, CWD},
+    crate::fs::{ResolveFlags, Statx, StatxRequestFlags, CWD},
     core::ptr::null,
 };