Adjust receivers for possibly synthetic properties access

Synthetic property accessors are treated as extension functions on Java
classes by the front-end. However, underlying Java accessor methods are
proper members.

compiler/testData/ir/irText/expressions/javaSyntheticPropertyAccess.kt

@@ -1,5 +1,8 @@
 // FILE: javaSyntheticPropertyAccess.kt
 fun test(j: J) {
+    j.foo
+    j.foo = 1
+    j.foo++
     j.foo += 1
 }