Description:
------------
The Reflection API doesn't return parameter information 
for built-in classes, like it does for user-defined 
classes.

Reproduce code:
---------------
// userland class
class ReflectionTest {
  function test($foo, $bar) {}
}

Reflection::export(
  new ReflectionClass('ReflectionTest'));

// example of a system class
Reflection::export(new ReflectionClass('Exception'));

Expected result:
----------------
The "methods" section of "Exception" should look like 
similar to the "methods" section of "ReflectionTest"

In other words, there should be a "Parameters" block for 
methods, like __construct(), that take parameters. This 
doesn't just apply to Exception, but all classes written 
in C.

Actual result:
--------------
ReflectionTest:

  - Methods [1] {
    Method [ <user> public method test ] {
      @@ /www/reflection.php 9 - 9

      - Parameters [2] {
        Parameter #0 [ $foo ]
        Parameter #1 [ $bar ]
      }
    }

Exception: 

  - Methods [9] {
    Method [ <internal> final private method __clone ] {
    }

    Method [ <internal> <ctor> method __construct ] {
    }

    Method [ <internal> final public method getMessage ] 
{
    }

    Method [ <internal> final public method getCode ] {
    }

    Method [ <internal> final public method getFile ] {
    }

    Method [ <internal> final public method getLine ] {
    }

    Method [ <internal> final public method getTrace ] {
    }

    Method [ <internal> final public method 
getTraceAsString ] {
    }

    Method [ <internal> public method __toString ] {
    }