fix: display framework version on bootstrapped component (#13252)

modules/@angular/core/src/core.ts

@@ -35,4 +35,4 @@ export * from './core_private_export';
 export * from './animation/metadata';
 export {AnimationTransitionEvent} from './animation/animation_transition_event';
 export {AnimationPlayer} from './animation/animation_player';
-export {Sanitizer, SecurityContext} from './security';
+export {Sanitizer, SecurityContext} from './security';

modules/@angular/core/src/linker/view_utils.ts

@@ -13,6 +13,7 @@ import {isPresent, looseIdentical} from '../facade/lang';
 import {ViewEncapsulation} from '../metadata/view';
 import {RenderComponentType, RenderDebugInfo, Renderer, RootRenderer} from '../render/api';
 import {Sanitizer} from '../security';
+import {VERSION} from '../version';
 
 import {ExpressionChangedAfterItHasBeenCheckedError} from './errors';
 import {AppView} from './view';
@@ -360,6 +361,7 @@ export function selectOrCreateRenderHostElement(
     for (let i = 0; i < attrs.length; i += 2) {
       renderer.setElementAttribute(hostElement, attrs.get(i), attrs.get(i + 1));
     }
+    renderer.setElementAttribute(hostElement, 'ng-version', VERSION.full);
   } else {
     hostElement = createRenderElement(renderer, null, elementName, attrs, debugInfo);
   }

modules/@angular/core/src/version.ts

@@ -19,4 +19,9 @@ export class Version {
   get minor(): string { return this.full.split('.')[1]; }
 
   get patch(): string { return this.full.split('.').slice(2).join('.'); }
-}
+}
+
+/**
+ * @stable
+ */
+export const VERSION = new Version('0.0.0-PLACEHOLDER');