fix lint

Author: mmalerba

src/material-experimental/mdc-list/list-base.ts

@@ -22,6 +22,10 @@ import {startWith} from 'rxjs/operators';
 
 @Directive()
 export class MatListBase {
+  // @HostBinding is used in the class as it is expected to be extended. Since @Component decorator
+  // metadata is not inherited by child classes, instead the host binding data is defined in a way
+  // that can be inherited.
+  // tslint:disable-next-line:no-host-decorator-in-concrete
   @HostBinding('class.mdc-list--non-interactive')
   _isNonInteractive: boolean;
 }