Top level functions inside module should be invoked using package$src class

compiler/testData/codegen/topLevelMemberInvocation/twoModules/1.kt

@@ -0,0 +1,12 @@
+package b
+
+import a.test1
+import a.prop
+
+fun test2() {
+   test1()
+   prop
+}
+
+// 1 a/APackage\.test1 \(\)V
+// 1 a/APackage\.getProp \(\)I