Format libstd/os with rustfmt

This commit applies rustfmt with rust-lang/rust's default settings to
files in src/libstd/os *that are not involved in any currently open PR*
to minimize merge conflicts. THe list of files involved in open PRs was
determined by querying GitHub's GraphQL API with this script:
https://gist.github.com/dtolnay/aa9c34993dc051a4f344d1b10e4487e8

With the list of files from the script in outstanding_files, the
relevant commands were:

    $ find src/libstd/os -name '*.rs' \
        | xargs rustfmt --edition=2018 --unstable-features --skip-children
    $ rg libstd/os outstanding_files | xargs git checkout --

Repeating this process several months apart should get us coverage of
most of the rest of the files.

To confirm no funny business:

    $ git checkout $THIS_COMMIT^
    $ git show --pretty= --name-only $THIS_COMMIT \
        | xargs rustfmt --edition=2018 --unstable-features --skip-children
    $ git diff $THIS_COMMIT  # there should be no difference

3 files changed, 20 insertions, 21 deletions

diff --git a/src/libstd/os/android/fs.rs b/src/libstd/os/android/fs.rs
index 90fdee567ae..9356e607c90 100644
--- a/src/libstd/os/android/fs.rs
+++ b/src/libstd/os/android/fs.rs
@@ -18,9 +18,11 @@ pub trait MetadataExt {
     /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
     /// cross-Unix abstractions contained within the raw stat.
     #[stable(feature = "metadata_ext", since = "1.1.0")]
-    #[rustc_deprecated(since = "1.8.0",
-                       reason = "deprecated in favor of the accessor \
-                                 methods of this trait")]
+    #[rustc_deprecated(
+        since = "1.8.0",
+        reason = "deprecated in favor of the accessor \
+                  methods of this trait"
+    )]
     #[allow(deprecated)]
     fn as_raw_stat(&self) -> &raw::stat;
 
@@ -62,10 +64,7 @@ pub trait MetadataExt {
 impl MetadataExt for Metadata {
     #[allow(deprecated)]
     fn as_raw_stat(&self) -> &raw::stat {
-        unsafe {
-            &*(self.as_inner().as_inner() as *const libc::stat
-                                          as *const raw::stat)
-        }
+        unsafe { &*(self.as_inner().as_inner() as *const libc::stat as *const raw::stat) }
     }
     fn st_dev(&self) -> u64 {
         self.as_inner().as_inner().st_dev as u64
diff --git a/src/libstd/os/android/mod.rs b/src/libstd/os/android/mod.rs
index ad1cd85095d..dbb0127f369 100644
--- a/src/libstd/os/android/mod.rs
+++ b/src/libstd/os/android/mod.rs
@@ -2,5 +2,5 @@
 
 #![stable(feature = "raw_ext", since = "1.1.0")]
 
-pub mod raw;
 pub mod fs;
+pub mod raw;
diff --git a/src/libstd/os/android/raw.rs b/src/libstd/os/android/raw.rs
index 946a77cbfd3..2b8ade8a82e 100644
--- a/src/libstd/os/android/raw.rs
+++ b/src/libstd/os/android/raw.rs
@@ -1,11 +1,13 @@
 //! Android-specific raw type definitions
 
 #![stable(feature = "raw_ext", since = "1.1.0")]
-#![rustc_deprecated(since = "1.8.0",
-                    reason = "these type aliases are no longer supported by \
-                              the standard library, the `libc` crate on \
-                              crates.io should be used instead for the correct \
-                              definitions")]
+#![rustc_deprecated(
+    since = "1.8.0",
+    reason = "these type aliases are no longer supported by \
+              the standard library, the `libc` crate on \
+              crates.io should be used instead for the correct \
+              definitions"
+)]
 #![allow(deprecated)]
 
 use crate::os::raw::c_long;
@@ -15,12 +17,12 @@ pub type pthread_t = c_long;
 
 #[doc(inline)]
 #[stable(feature = "raw_ext", since = "1.1.0")]
-pub use self::arch::{dev_t, mode_t, blkcnt_t, blksize_t, ino_t, nlink_t, off_t, stat, time_t};
+pub use self::arch::{blkcnt_t, blksize_t, dev_t, ino_t, mode_t, nlink_t, off_t, stat, time_t};
 
 #[cfg(any(target_arch = "arm", target_arch = "x86"))]
 mod arch {
-    use crate::os::raw::{c_uint, c_uchar, c_ulonglong, c_longlong, c_ulong};
-    use crate::os::unix::raw::{uid_t, gid_t};
+    use crate::os::raw::{c_longlong, c_uchar, c_uint, c_ulong, c_ulonglong};
+    use crate::os::unix::raw::{gid_t, uid_t};
 
     #[stable(feature = "raw_ext", since = "1.1.0")]
     pub type dev_t = u64;
@@ -83,14 +85,12 @@ mod arch {
         #[stable(feature = "raw_ext", since = "1.1.0")]
         pub st_ino: c_ulonglong,
     }
-
 }
 
-
 #[cfg(target_arch = "aarch64")]
 mod arch {
     use crate::os::raw::{c_uchar, c_ulong};
-    use crate::os::unix::raw::{uid_t, gid_t};
+    use crate::os::unix::raw::{gid_t, uid_t};
 
     #[stable(feature = "raw_ext", since = "1.1.0")]
     pub type dev_t = u64;
@@ -157,8 +157,8 @@ mod arch {
 
 #[cfg(target_arch = "x86_64")]
 mod arch {
-    use crate::os::raw::{c_uint, c_long, c_ulong};
-    use crate::os::unix::raw::{uid_t, gid_t};
+    use crate::os::raw::{c_long, c_uint, c_ulong};
+    use crate::os::unix::raw::{gid_t, uid_t};
 
     #[stable(feature = "raw_ext", since = "1.1.0")]
     pub type dev_t = u64;