Cleanup: Add missing comments and newlines in a few files.

BUG=None
TEST=None

Change-Id: If14572f0331a3860e6d82ce085d20e484edc29af
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1753551
Reviewed-by: Alex Klein <saklein@chromium.org>
Commit-Queue: Alex Klein <saklein@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
diff --git a/lib/build_target_util.py b/lib/build_target_util.py
index 9806f7f..e0a1480 100644
--- a/lib/build_target_util.py
+++ b/lib/build_target_util.py
@@ -58,6 +58,7 @@
   def name(self):
     return self._name
 
+
 def GetDefaultSysrootPath(target_name):
   if target_name:
     return os.path.join('/build', target_name)