rename platformName annotation to jvmName

compiler/testData/codegen/boxWithJava/platformName/FakePlatformName.java

@@ -1,7 +1,7 @@
-import kotlin.platform.platformName;
+import kotlin.jvm.jvmName;
 
 public class FakePlatformName {
-    @platformName(name = "fake")
+    @jvmName(name = "fake")
     public String foo() {
         return "foo";
     }

compiler/testData/codegen/boxWithStdlib/reflection/functions/platformName.kt

@@ -1,6 +1,4 @@
-import kotlin.platform.platformName
-
-@platformName("Fail")
+@jvmName("Fail")
 fun OK() {}
 
 fun box() = ::OK.name