[Wasm] Add box and stdlib tests in wasi mode

wasm/wasm.tests/_commonFiles/arrayAsserts.kt

@@ -0,0 +1,25 @@
+package kotlin
+
+fun <T> assertArrayEquals(expected: Array<out T>, actual: Array<out T>, message: String? = null) {
+    if (!arraysEqual(expected, actual)) {
+        val msg = if (message == null) "" else ", message = '$message'"
+        fail("Unexpected array: expected = '$expected', actual = '$actual'$msg")
+    }
+}
+
+private fun <T> arraysEqual(first: Array<out T>, second: Array<out T>): Boolean {
+    if (first === second) return true
+    if (first.size != second.size) return false
+    for (index in 0..first.size - 1) {
+        if (!equal(first[index], second[index])) return false
+    }
+    return true
+}
+
+private fun equal(first: Any?, second: Any?) =
+    if (first is Array<*> && second is Array<*>) {
+        arraysEqual(first, second)
+    }
+    else {
+        first == second
+    }