Minor, rename codegen tests on platformName and platformStatic

compiler/testData/codegen/boxWithStdlib/jvmStatic/funAccess.kt

@@ -0,0 +1,18 @@
+import kotlin.platform.platformStatic
+
+var holder = ""
+
+fun getA(): A {
+    holder += "OK"
+    return A
+}
+
+object A {
+    @platformStatic fun a(): String {
+        return holder
+    }
+}
+
+fun box(): String {
+    return getA().a()
+}