Make some tests JVM only

compiler/testData/codegen/box/regressions/kt1202.kt

@@ -1,12 +1,12 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
+// TARGET_BACKEND: JVM
 
 // WITH_RUNTIME
 // FULL_JDK
 
 package testeval
 
-import java.util.*
+import java.util.LinkedList
+import java.util.Deque
 
 interface Expression
 class Num(val value : Int) : Expression

compiler/testData/codegen/box/regressions/kt1406.kt

@@ -1,17 +1,15 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
+// TARGET_BACKEND: JVM
 
 // WITH_RUNTIME
 // FULL_JDK
 
 package pack
 
-import java.util.ArrayList
 import java.util.regex.Pattern
 
 class C{
     public fun foo(){
-        val items : Collection<Item> = java.util.Collections.singleton(Item())!!
+        val items : Collection<Item> = listOf(Item())
         val result = ArrayList<Item>()
         val pattern: Pattern? = Pattern.compile("...")
         items.filterTo(result) {