This setting seems to better match the indentation that is used in GCC.

Adds an exra level of indentation after braces in a case statement.

Only manual testing done on the switch statements in
c-common.cc:resolve_overloaded_builtin and
alias.cc:record_component_aliases.

Ok for trunk?

contrib/ChangeLog:

	* clang-format: Set BraceWrapping.AfterCaseLabel.

Signed-off-by: Matthew Malcomson <mmalcomson@nvidia.com>