compiler: fix indentation of select statement AST dump

    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/184997

From-SVN: r273032

gcc/go/gofrontend/MERGE

-bf66d40bc7adb438dcfac85d73bfa7b17217eed9
+197b6fdfb861f07bab7365e350b5b855cfccc290
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

gcc/go/gofrontend/statements.cc

@@ -5766,6 +5766,7 @@ Select_statement::do_dump_statement(Ast_dump_context* ast_dump_context) const
     {
       ast_dump_context->ostream() << " {" << dsuffix(location()) << std::endl;
       this->clauses_->dump_clauses(ast_dump_context);
+      ast_dump_context->print_indent();
       ast_dump_context->ostream() << "}";
     }
   ast_dump_context->ostream() << std::endl;