LinkDynamicModules iteration and FinishLoad incompatible

[guybedford]

LinkDynamicModules runs a loop through the load record list (https://github.com/jorendorff/js-loaders/blob/master/Loader.js#L1640)

FinishLoad clears load records from the load record list of the linkSets (https://github.com/jorendorff/js-loaders/blob/master/Loader.js#L1440)

So the iteration needs to take into account that the array will have changed.

Perhaps replace line 1640 with something like:

  while(loads.length) {
    load = loads[0];
    load.status = 'linked';
    finishLoad(loader, load);
  }

[guybedford]

BuildLinkageGroups effectively does this clone, stopping this from happening.