1.0RC1: $log.error.apply() resulting in error on IE

New angular 1.0 RC1 line 4942 
$log.error.apply($log, arguments);
Results in the following error on IE
"Error: Object doesn't support property or method 'apply'"
In previous versions the apply method was not being used on $log.error. Possible fix at line 6765.

```
    // we are IE, in which case there is nothing we can do
    return logFn;
```
