Fix missing DirEntryExt::ino

The DirEntryExt::ino() implementation was omitted from the first
iteration of this patch, because a dependency needed to be
configured. The fix is straightforward enough.

src/libstd/sys/unix/ext/fs.rs

@@ -312,7 +312,6 @@ pub trait DirEntryExt {
 }
 
 #[stable(feature = "dir_entry_ext", since = "1.1.0")]
-#[cfg(not(target_os = "fuchsia"))]
 impl DirEntryExt for fs::DirEntry {
     fn ino(&self) -> u64 { self.as_inner().ino() }
 }

src/libstd/sys/unix/fs.rs

@@ -312,7 +312,8 @@ impl DirEntry {
               target_os = "emscripten",
               target_os = "android",
               target_os = "solaris",
-              target_os = "haiku"))]
+              target_os = "haiku",
+              target_os = "fuchsia"))]
     pub fn ino(&self) -> u64 {
         self.entry.d_ino as u64
     }