fix(autocomplete): add mat version of autocomplete @input (#2928)

Author: kara

src/lib/autocomplete/autocomplete-trigger.ts

@@ -92,6 +92,16 @@ export class MdAutocompleteTrigger implements AfterContentInit, ControlValueAcce
   /* The autocomplete panel to be attached to this trigger. */
   @Input('mdAutocomplete') autocomplete: MdAutocomplete;
 
+  /** Property with mat- prefix for no-conflict mode. */
+  @Input('matAutocomplete')
+  get _matAutocomplete(): MdAutocomplete {
+    return this.autocomplete;
+  }
+
+  set _matAutocomplete(autocomplete: MdAutocomplete) {
+    this.autocomplete = autocomplete;
+  }
+
   constructor(private _element: ElementRef, private _overlay: Overlay,
               private _viewContainerRef: ViewContainerRef,
               @Optional() private _dir: Dir, private _zone: NgZone,