[mscorlib] Marshal.GetExceptionForHR() takes an `errorInfo` parameter.

Parameter names are part of the ABI because of C#4 named parameter.
Consequently, they *must* be consistent with .NET, and .NET a
parameter name of "errorInfo", *not* "errorInfoPtr" [0]:

	public static Exception GetExceptionForHR(
		int errorCode,
		IntPtr errorInfo
	)

Change the parameter name from `errorCodeInfo` to `errorCode` so that
the parameter name is consistent with .NET.

[0]: http://msdn.microsoft.com/en-us/library/3xade62s(v=vs.100).aspx