Native context: run prologue.js before runtime.js

src/runtime.js

Index: src/runtime.js
diff --git a/src/runtime.js b/src/runtime.js
index 4de9c2997df1a5debf4341aaef8fdb6d212b2902..20b608e9072430597cbdb5607ceb0f0237709522 100644
--- a/src/runtime.js
+++ b/src/runtime.js
@@ -897,6 +897,7 @@ function ToPositiveInteger(x, rangeErrorIndex) {
 %FunctionSetPrototype(GlobalArray, new GlobalArray(0));
 
 // ----------------------------------------------------------------------------
+// Exports
 
 $concatIterableToArray = ConcatIterableToArray;
 $defaultNumber = DefaultNumber;
@@ -915,4 +916,11 @@ $toPositiveInteger = ToPositiveInteger;
 $toPrimitive = ToPrimitive;
 $toString = ToString;
 
+utils.ExportToRuntime(function(to) {
+  to.ToNumber = $toNumber;
+  to.ToString = $toString;
+  to.ToInteger = $toInteger;
+  to.ToLength = $toLength;
+});
+
 })