KT-2752: fix JsName with explicit use target. Add some tests for JsName with use targets

js/js.translator/testData/box/propertyAccess/accessorsWithJsName.kt

@@ -0,0 +1,37 @@
+package foo
+
+class A {
+    val x: Int
+        @JsName("getX_") get() = 23
+
+    var y: Int = 0
+        @JsName("getY_") get() = field + 10
+        @JsName("setY_") set(value) {
+            field = value
+        }
+}
+
+val A.z: Int
+    @JsName("getZ_") get() = 42
+
+fun getPackage() = js("return Kotlin.modules.JS_TESTS.foo")
+
+fun box(): String {
+    val a = A()
+
+    assertEquals(23, a.x)
+    assertEquals(10, a.y)
+    a.y = 13
+    assertEquals(23, a.y)
+    assertEquals(42, a.z)
+
+    val d: dynamic = A()
+
+    assertEquals(23, d.getX_())
+    assertEquals(10, d.getY_())
+    d.setY_(13)
+    assertEquals(23, d.getY_())
+    assertEquals(42, getPackage().getZ_(d))
+
+    return "OK"
+}