clang-format: Improve formatting of functions with multiple trailing tokens.

Before:
  void SomeFunction(aaaaaaaaaaaaaaaaaaaaaaaaaa,
                    aaaaaaaaaaaaaaaaaaaaaaaaaa) override
  final;

After:
  void SomeFunction(aaaaaaaaaaaaaaaaaaaaaaaaaa,
                    aaaaaaaaaaaaaaaaaaaaaaaaaa) override final;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191494 91177308-0d34-0410-b5e6-96231b3b80d8