Add more init tests.

backend.native/tests/runtime/basic/initializers4.kt

@@ -0,0 +1,7 @@
+const val INT_MAX_POWER_OF_TWO: Int = Int.MAX_VALUE / 2 + 1
+val DOUBLE = Double.MAX_VALUE - 1.0
+
+fun main(args: Array<String>) {
+    println(INT_MAX_POWER_OF_TWO)
+    println(DOUBLE > 0.0)
+}