Fix clang-format-11 brace wrapping rule

Fix clang-format-11 brace wrapping rule

There was some error when we try to execute clang-format-11 for csharp-binder.

if
{
  // blabla
} else
{
  // bla bla
}

This rule was not matched with dali coding style guide.

Let we change error value for clang-format file.

Note : Since we dont want to tab for extern cases, we need to use Custom,
instead of Allman.

Change-Id: I29127a7dc8fc0d75287f2f67ee4baf1e5673e907
Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>