fix(compiler): make sourcemaps work in AOT mode

Inlcuded fixes:
- include preamble in generated source map
- always add a mapping for line/col 0 so that the
  generated sourcemap is not sparse
- use a uniue sourceUrl for inline templates even
  in the AOT case

packages/compiler-cli/integrationtest/test/source_map_spec.ts

@@ -0,0 +1,41 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import './init';
+import {BindingErrorComp} from '../src/errors';
+import {createComponent} from './util';
+
+describe('source maps', () => {
+  it('should report source location for binding errors', () => {
+    const comp = createComponent(BindingErrorComp);
+    let error: any;
+    try {
+      comp.detectChanges();
+    } catch (e) {
+      error = e;
+    }
+    const sourcePosition = getSourcePositionForStack(error.stack);
+    expect(sourcePosition.line).toBe(2);
+    expect(sourcePosition.column).toBe(13);
+    expect(sourcePosition.source.endsWith('errors.html')).toBe(true);
+  });
+});
+
+function getSourcePositionForStack(stack: string): {source: string, line: number, column: number} {
+  const htmlLocations = stack
+                            .split('\n')
+                            // e.g. at View_MyComp_0 (...html:153:40)
+                            .map(line => /\((.*\.html):(\d+):(\d+)/.exec(line))
+                            .filter(match => !!match)
+                            .map(match => ({
+                                   source: match[1],
+                                   line: parseInt(match[2], 10),
+                                   column: parseInt(match[3], 10)
+                                 }));
+  return htmlLocations[0];
+}