fix($compile): rename $compileNote to compileNode

Directives was observing different instances of Attributes than the one
that interpolation was registered with because we failed to realize
that the compile node and link node were the same (one of them
was a wrapper rather than raw node)

Closes #1941

src/ng/compile.js

@@ -938,7 +938,7 @@ function $CompileProvider($provide) {
           }
 
           directives.unshift(derivedSyncDirective);
-          afterTemplateNodeLinkFn = applyDirectivesToNode(directives, $compileNode, tAttrs, childTranscludeFn);
+          afterTemplateNodeLinkFn = applyDirectivesToNode(directives, compileNode, tAttrs, childTranscludeFn);
           afterTemplateChildLinkFn = compileNodes($compileNode.contents(), childTranscludeFn);
 
 

test/ng/compileSpec.js

@@ -1538,6 +1538,25 @@ describe('$compile', function() {
         expect(element.text()).toEqual('WORKS');
       });
     });
+
+    it('should support $observe inside link function on directive object', function() {
+      module(function() {
+        directive('testLink', valueFn({
+          templateUrl: 'test-link.html',
+          link: function(scope, element, attrs) {
+            attrs.$observe( 'testLink', function ( val ) {
+              scope.testAttr = val;
+            });
+          }
+        }));
+      });
+      inject(function($compile, $rootScope, $templateCache) {
+        $templateCache.put('test-link.html', '{{testAttr}}' );
+        element = $compile('<div test-link="{{1+2}}"></div>')($rootScope);
+        $rootScope.$apply();
+        expect(element.text()).toBe('3');
+      });
+    });
   });