Don't skip receiver with side effects on static calls

#KT-6278 Fixed

compiler/testData/codegen/boxWithStdlib/platformStatic/postfixInc.kt

@@ -0,0 +1,47 @@
+import kotlin.platform.platformStatic
+
+object A {
+
+    platformStatic var a: Int = 1
+
+    var b: Int = 1
+        [platformStatic] get
+
+    var c: Int = 1
+        [platformStatic] set
+
+}
+
+var holder = ""
+fun getA(): A {
+    holder += "getA()"
+    return A
+}
+
+
+fun box(): String {
+
+    var p = A.a++
+    if (p != 1 || A.a != 2) return "fail 1"
+
+    p = A.b++
+    if (p != 1 || A.b != 2) return "fail 2"
+
+    p = A.c++
+    if (p != 1 || A.c != 2) return "fail 3"
+
+
+    p = getA().a++
+    if (p != 2 || A.a != 3 || holder != "getA()") return "fail 4: $holder"
+    holder = ""
+
+    p = getA().b++
+    if (p != 2 || A.b != 3 || holder != "getA()") return "fail 5: $holder"
+    holder = ""
+
+    p = getA().c++
+    if (p != 2 || A.c != 3 || holder != "getA()") return "fail 6: $holder"
+    holder = ""
+
+    return "OK"
+}