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

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

@@ -0,0 +1,6 @@
+package a
+
+val prop = 1
+
+// 2 INVOKESTATIC a/APackage\$src\$1\$[\-]*[0-9]*\.getProp \(\)I
+// 1 GETSTATIC a/APackage\$src\$1\$[\-]*[0-9]*\.prop \: I

compiler/testData/codegen/topLevelMemberInvocation/property/2.kt

@@ -0,0 +1,7 @@
+package b
+
+import a.prop
+
+fun test() {
+    prop
+}