cros: lint: enable C0321 (More than one statement on a single line)

We don't want to use this style, and we have very few instances of it
in our code base, so re-enable it and fix the few spots impacted.

BUG=None
TEST=`cros lint buildbot/*.py cros/*/*.py lib/*.py scripts/*.py` doesn't warn about C0321
TEST=`./buildbot/run_tests` passes

Change-Id: I98d99a3505e106ad693d256904b5124af20f840b
Reviewed-on: https://chromium-review.googlesource.com/176270
Reviewed-by: Matt Tennant <mtennant@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/parallel_emerge.py b/scripts/parallel_emerge.py
index 773c582..56bc1f9 100644
--- a/scripts/parallel_emerge.py
+++ b/scripts/parallel_emerge.py
@@ -884,8 +884,10 @@
   if pid == 0:
     try:
       # Sanity checks.
-      if sys.stdout.fileno() != 1: raise Exception("sys.stdout.fileno() != 1")
-      if sys.stderr.fileno() != 2: raise Exception("sys.stderr.fileno() != 2")
+      if sys.stdout.fileno() != 1:
+        raise Exception("sys.stdout.fileno() != 1")
+      if sys.stderr.fileno() != 2:
+        raise Exception("sys.stderr.fileno() != 2")
 
       # - Redirect 1 (stdout) and 2 (stderr) at our temporary file.
       # - Redirect 0 to point at sys.stdin. In this case, sys.stdin