[MERGE #1440 @ianwjhalliday] Fixes build break on Chinese Windows 10 VS 2015

Merge pull request #1440 from ianwjhalliday:fix1429

Fixes #1429

Chevron characters appears in the source comments but the compiler on
Chinese Windows 10 believes the code page for the source file cannot
represent these characters.

Fix by converting them to '<<' and '>>'

Author: Ian Halliday

lib/Runtime/Library/JavascriptPromise.cpp

@@ -51,7 +51,7 @@ namespace Js
         }
         RecyclableObject* executor = RecyclableObject::FromVar(args[1]);
 
-        // 3. Let promise be ? OrdinaryCreateFromConstructor(NewTarget, "%PromisePrototype%", «[[PromiseState]], [[PromiseResult]], [[PromiseFulfillReactions]], [[PromiseRejectReactions]], [[PromiseIsHandled]] »).
+        // 3. Let promise be ? OrdinaryCreateFromConstructor(NewTarget, "%PromisePrototype%", <<[[PromiseState]], [[PromiseResult]], [[PromiseFulfillReactions]], [[PromiseRejectReactions]], [[PromiseIsHandled]] >>).
         JavascriptPromise* promise = library->CreatePromise();
         if (isCtorSuperCall)
         {
@@ -70,7 +70,7 @@ namespace Js
 
         JavascriptExceptionObject* exception = nullptr;
 
-        // 9. Let completion be Call(executor, undefined, « resolvingFunctions.[[Resolve]], resolvingFunctions.[[Reject]] »).
+        // 9. Let completion be Call(executor, undefined, << resolvingFunctions.[[Resolve]], resolvingFunctions.[[Reject]] >>).
         try
         {
             CALL_FUNCTION(executor, CallInfo(CallFlags_Value, 3),
@@ -86,7 +86,7 @@ namespace Js
         if (exception != nullptr)
         {
             // 10. If completion is an abrupt completion, then
-            //    a. Perform ? Call(resolvingFunctions.[[Reject]], undefined, « completion.[[Value]] »).
+            //    a. Perform ? Call(resolvingFunctions.[[Reject]], undefined, << completion.[[Value]] >>).
             TryRejectWithExceptionObject(exception, reject, scriptContext);
         }
 
@@ -453,7 +453,7 @@ namespace Js
         // 3. Let promiseCapability be NewPromiseCapability(C).
         JavascriptPromiseCapability* promiseCapability = NewPromiseCapability(constructor, scriptContext);
 
-        // 4. Perform ? Call(promiseCapability.[[Reject]], undefined, « r »).
+        // 4. Perform ? Call(promiseCapability.[[Reject]], undefined, << r >>).
         TryCallResolveOrRejectHandler(promiseCapability->GetReject(), r, scriptContext);
 
         // 5. Return promiseCapability.[[Promise]].
@@ -507,7 +507,7 @@ namespace Js
         // 4. Let promiseCapability be NewPromiseCapability(C).
         JavascriptPromiseCapability* promiseCapability = NewPromiseCapability(constructor, scriptContext);
 
-        // 5. Perform ? Call(promiseCapability.[[Resolve]], undefined, « x »).
+        // 5. Perform ? Call(promiseCapability.[[Resolve]], undefined, << x >>).
         TryCallResolveOrRejectHandler(promiseCapability->GetResolve(), x, scriptContext);
 
         // 6. Return promiseCapability.[[Promise]].