JS BE: expose imported modules via $$importsForInline$$ property

... and use it as prefix to FQN in inline functions. This allows
to properly inline function declared in module A to module B,
when this function calls another function in module C.

See KT-18201

js/js.translator/testData/box/crossModuleRef/inlineJsModulePackage.kt

@@ -0,0 +1,28 @@
+// EXPECTED_REACHABLE_NODES: 490
+// MODULE: lib1
+// FILE: lib1.js
+define("lib1", [], function() {
+    return {
+        foo: function() {
+            return "OK";
+        }
+    };
+})
+
+// MODULE: lib2(lib1)
+// FILE: lib2.kt
+// MODULE_KIND: AMD
+@file:JsModule("lib1")
+
+external fun foo(): String
+
+// MODULE: lib3(lib2)
+// FILE: lib3.kt
+// MODULE_KIND: AMD
+inline fun bar() = foo()
+
+// MODULE: main(lib3)
+// FILE: main.kt
+// MODULE_KIND: AMD
+
+fun box() = bar()