Add test when require is just a function in external module

tests/baselines/reference/requireAsFunctionInExternalModule.errors.txt

@@ -0,0 +1,20 @@
+tests/cases/compiler/m2.ts(1,10): error TS2305: Module '"tests/cases/compiler/m"' has no exported member 'hello'.
+
+
+==== tests/cases/compiler/c.js (0 errors) ====
+    export default function require(a) { }
+    export function has(a) { return true }
+    
+==== tests/cases/compiler/m.js (0 errors) ====
+    import require, { has } from "./c"
+    export function hello() { }
+    if (has('ember-debug')) {
+        require('ember-debug');
+    }
+    
+==== tests/cases/compiler/m2.ts (1 errors) ====
+    import { hello } from "./m";
+             ~~~~~
+!!! error TS2305: Module '"tests/cases/compiler/m"' has no exported member 'hello'.
+    hello();
+    

tests/baselines/reference/requireAsFunctionInExternalModule.js

@@ -0,0 +1,37 @@
+//// [tests/cases/compiler/requireAsFunctionInExternalModule.ts] ////
+
+//// [c.js]
+export default function require(a) { }
+export function has(a) { return true }
+
+//// [m.js]
+import require, { has } from "./c"
+export function hello() { }
+if (has('ember-debug')) {
+    require('ember-debug');
+}
+
+//// [m2.ts]
+import { hello } from "./m";
+hello();
+
+
+//// [c.js]
+"use strict";
+function require(a) { }
+exports.__esModule = true;
+exports["default"] = require;
+function has(a) { return true; }
+exports.has = has;
+//// [m.js]
+"use strict";
+var c_1 = require("./c");
+function hello() { }
+exports.hello = hello;
+if (c_1.has('ember-debug')) {
+    c_1["default"]('ember-debug');
+}
+//// [m2.js]
+"use strict";
+var m_1 = require("./m");
+m_1.hello();

tests/cases/compiler/requireAsFunctionInExternalModule.ts

@@ -0,0 +1,16 @@
+// @allowjs: true
+// @outDir: dist
+// @Filename: c.js
+export default function require(a) { }
+export function has(a) { return true }
+
+// @Filename: m.js
+import require, { has } from "./c"
+export function hello() { }
+if (has('ember-debug')) {
+    require('ember-debug');
+}
+
+// @Filename: m2.ts
+import { hello } from "./m";
+hello();