Add test for decompiled text

idea/testData/libraries/decompiledText/Object/Object.kt

@@ -0,0 +1,19 @@
+package test
+
+object Object {
+    fun f() {
+    }
+
+    fun Int.f() {
+    }
+
+    private fun privateFun() {
+    }
+
+    val Int.g: Int
+        get() = this + 2
+
+    fun <T, K, G> complexFun(a: T, b: K, c: G): G {
+        throw AssertionError()
+    }
+}