coverage. Let coverage-dump support parsing mcdc info

Author: zhuyunxing

src/tools/coverage-dump/src/covfun.rs

@@ -75,6 +75,8 @@ pub(crate) fn dump_covfun_mappings(
                         println!("    true  = {}", expression_resolver.format_term(r#true));
                         println!("    false = {}", expression_resolver.format_term(r#false));
                     }
+
+                    MappingKind::MCDCDecision { .. } => {}
                     _ => (),
                 }
             }