8194734 : Handle to jimage file inherited into child processes (win)

[Alexander Miloslavskiy]

Please get Windows change applied. I'm mostly interested in this part, 
because bug is currently hidden on Unix.

> I'm still puzzled by the Unix change. I completely agree with Martin 
> about CLOSEXEC but there is something fishy here that we need to get a 
> handle on. When we fork then we close >= 3 in the child so there 
> shouldn't be any magic with fd 3.