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/src/aot/compiler.ts

@@ -33,7 +33,8 @@ export class AotCompiler {
       private _styleCompiler: StyleCompiler, private _viewCompiler: ViewCompiler,
       private _ngModuleCompiler: NgModuleCompiler, private _outputEmitter: OutputEmitter,
       private _summaryResolver: SummaryResolver<StaticSymbol>, private _localeId: string,
-      private _translationFormat: string, private _symbolResolver: StaticSymbolResolver) {}
+      private _translationFormat: string, private _genFilePreamble: string,
+      private _symbolResolver: StaticSymbolResolver) {}
 
   clearCache() { this._metadataResolver.clearCache(); }
 
@@ -215,7 +216,8 @@ export class AotCompiler {
       exportedVars: string[]): GeneratedFile {
     return new GeneratedFile(
         srcFileUrl, genFileUrl,
-        this._outputEmitter.emitStatements(genFileUrl, statements, exportedVars));
+        this._outputEmitter.emitStatements(
+            srcFileUrl, genFileUrl, statements, exportedVars, this._genFilePreamble));
   }
 }
 

packages/compiler/src/aot/compiler_factory.ts

@@ -79,6 +79,6 @@ export function createAotCompiler(compilerHost: AotCompilerHost, options: AotCom
   const compiler = new AotCompiler(
       config, compilerHost, resolver, tmplParser, new StyleCompiler(urlResolver), viewCompiler,
       new NgModuleCompiler(), new TypeScriptEmitter(importResolver), summaryResolver,
-      options.locale, options.i18nFormat, symbolResolver);
+      options.locale, options.i18nFormat, options.genFilePreamble, symbolResolver);
   return {compiler, reflector: staticReflector};
 }

packages/compiler/src/aot/compiler_options.ts

@@ -11,4 +11,6 @@ export interface AotCompilerOptions {
   i18nFormat?: string;
   translations?: string;
   enableLegacyTemplate?: boolean;
+  /** preamble for all generated source files */
+  genFilePreamble?: string;
 }