Fix : clang-10 issue for Networkd

- Added `AfterCaseLabel: true` clang rule so that
  the clang-format check does not fail in version 10.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: Id19ba9afe9ae74847c98e2cf84e924d8dd671164
1 file changed