clang-format: Fix fake parentheses placement with comments.

Before:
  return (a > b
          // comment1
      // comment2
      || c);

After:
  return (a > b
      // comment1
      // comment2
      || c);

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@223234 91177308-0d34-0410-b5e6-96231b3b80d8