Format libstd/sys with rustfmt

This commit applies rustfmt with rust-lang/rust's default settings to
files in src/libstd/sys *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/sys -name '*.rs' \
        | xargs rustfmt --edition=2018 --unstable-features --skip-children
    $ rg libstd/sys 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

1 files changed, 3 insertions, 3 deletions

diff --git a/src/libstd/sys/windows/ext/thread.rs b/src/libstd/sys/windows/ext/thread.rs
index fdc7e7fa32f..41c29f5b950 100644
--- a/src/libstd/sys/windows/ext/thread.rs
+++ b/src/libstd/sys/windows/ext/thread.rs
@@ -2,9 +2,9 @@
 
 #![stable(feature = "thread_extensions", since = "1.9.0")]
 
-use crate::os::windows::io::{RawHandle, AsRawHandle, IntoRawHandle};
-use crate::thread;
+use crate::os::windows::io::{AsRawHandle, IntoRawHandle, RawHandle};
 use crate::sys_common::{AsInner, IntoInner};
+use crate::thread;
 
 #[stable(feature = "thread_extensions", since = "1.9.0")]
 impl<T> AsRawHandle for thread::JoinHandle<T> {
@@ -14,7 +14,7 @@ impl<T> AsRawHandle for thread::JoinHandle<T> {
 }
 
 #[stable(feature = "thread_extensions", since = "1.9.0")]
-impl<T> IntoRawHandle for thread::JoinHandle<T>  {
+impl<T> IntoRawHandle for thread::JoinHandle<T> {
     fn into_raw_handle(self) -> RawHandle {
         self.into_inner().into_handle().into_raw() as *mut _
     }