Define flags AT_STATX_* for Linux musl

Author: heiher

src/backend/libc/fs/types.rs

@@ -67,15 +67,15 @@ bitflags! {
         const RESOLVE_BENEATH = bitcast!(c::AT_RESOLVE_BENEATH);
 
         /// `AT_STATX_SYNC_AS_STAT`
-        #[cfg(all(target_os = "linux", target_env = "gnu"))]
+        #[cfg(all(target_os = "linux", any(target_env = "gnu", target_env = "musl")))]
         const STATX_SYNC_AS_STAT = bitcast!(c::AT_STATX_SYNC_AS_STAT);
 
         /// `AT_STATX_FORCE_SYNC`
-        #[cfg(all(target_os = "linux", target_env = "gnu"))]
+        #[cfg(all(target_os = "linux", any(target_env = "gnu", target_env = "musl")))]
         const STATX_FORCE_SYNC = bitcast!(c::AT_STATX_FORCE_SYNC);
 
         /// `AT_STATX_DONT_SYNC`
-        #[cfg(all(target_os = "linux", target_env = "gnu"))]
+        #[cfg(all(target_os = "linux", any(target_env = "gnu", target_env = "musl")))]
         const STATX_DONT_SYNC = bitcast!(c::AT_STATX_DONT_SYNC);
 
         /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags>