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

[Alexander Miloslavskiy]

 > I'm hoping that JDK core libraries overall do a better job of reusing
 > the code in e.g.
 > src/hotspot/os/linux/os_linux:os::open
 > somehow, that actually gets the CLOEXEC bit right.

os::open is exactly what was used in libjimage before the bug was 
introduced. I already described it in my first mail.

I'm rarther new with all this. I understand it that hotspot is some sort 
of staging grounds for alpha features? If so, I can understand why 
libjimage no longer uses it. Also, it felt reasonable to me that someone 
wanted a library with dependencies minimzed.