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, 2 insertions, 2 deletions

diff --git a/src/libstd/sys/hermit/condvar.rs b/src/libstd/sys/hermit/condvar.rs
index 8e52b3da1b1..5b7f16ce562 100644
--- a/src/libstd/sys/hermit/condvar.rs
+++ b/src/libstd/sys/hermit/condvar.rs
@@ -18,12 +18,12 @@ impl Condvar {
     }
 
     pub unsafe fn notify_one(&self) {
-         let _ = abi::notify(self.id(), 1);
+        let _ = abi::notify(self.id(), 1);
     }
 
     #[inline]
     pub unsafe fn notify_all(&self) {
-         let _ = abi::notify(self.id(), -1 /* =all */);
+        let _ = abi::notify(self.id(), -1 /* =all */);
     }
 
     pub unsafe fn wait(&self, mutex: &Mutex) {