refactor(benchmarks): add index_aot to support AoT bootstrap. (#12105)

Note: This only make sure it can compile the AoT version, but does not yet use it in e2e tests.

modules/@angular/compiler-cli/integrationtest/benchmarks/README.md

@@ -0,0 +1,6 @@
+# Overview
+
+This folder will be filled with the benchmark sources
+so that we can do offline compilation for them.
+
+

modules/@angular/compiler-cli/integrationtest/tsconfig.json

@@ -15,5 +15,15 @@
         "declaration": true,
         "lib": ["es6", "dom"],
         "baseUrl": "."
-    }
+    },
+
+    "files": [
+        "src/module",
+        "src/bootstrap",
+        "test/all_spec",
+        "benchmarks/src/tree/ng2/index_aot.ts",
+        "benchmarks/src/tree/ng2_switch/index_aot.ts",
+        "benchmarks/src/largetable/ng2/index_aot.ts",
+        "benchmarks/src/largetable/ng2_switch/index_aot.ts"
+    ]
 }