Add FULL_JDK to tests in codegen/boxWithStdlib/fullJdk/

Drop the old scheme which relied on the directory name

compiler/testData/codegen/boxWithStdlib/fullJdk/native/staticNative.kt

@@ -1,6 +1,6 @@
-package foo
+// FULL_JDK
 
-import kotlin.jvm.*
+package foo
 
 class WithNative {
     companion object {
@@ -30,4 +30,4 @@ fun box(): String {
         if (e.message != "foo.ObjWithNative.bar(JLjava/lang/String;)D") return "Fail 2: " + e.message
     }
     return "OK"
-}
+}