KT-5214 Annotation to provide platform name to avoid signature conflict

#KT-5214 Fixed

compiler/testData/codegen/boxWithStdlib/platformNames/clashingErasure.kt

@@ -0,0 +1,16 @@
+import kotlin.platform.*
+
+fun <T> List<T>.foo() = "foo"
+
+[platformName("fooInt")]
+fun List<Int>.foo() = "fooInt"
+
+fun box(): String {
+    val strings = listOf("", "").foo()
+    if (strings != "foo") return "Fail: $strings"
+
+    val ints = listOf(1, 2).foo()
+    if (ints != "fooInt") return "Fail: $ints"
+
+    return "OK"
+}