Inline callable references

#KT-6900 Fixed

compiler/testData/codegen/boxInline/callableReference/classLevel.2.kt

@@ -0,0 +1,9 @@
+package test
+
+class A(val z: Int) {
+    fun calc() = z
+}
+
+inline fun call(p: A, s: A.() -> Int): Int {
+    return p.s()
+}