PR# 10743 Quick_finalize should handle errors gracefully

Quick_finalize should handle errors gracefully and display
an error message instead of dying with an exception trace
(meaning errors like file or directtory open, read or write
errors).

Execute `finish_freezing' in wrong directory (e.g. "/" where you
don't have permission to write anything).  Output is not very
friendly - quick_finalize should say what the problem is instead
of dying with an exception trace.  Output is:

Preparing C compilation ...

quick_finalize: system execution failed.
Following is the set of recorded exceptions:

-------------------------------------------------------------------------------
Class / Object      Routine                Nature of exception           Effect
-------------------------------------------------------------------------------
FAST_COMPILE        root's creation        Permission denied:
<000D4808>                                 Operating system error.       Exit
-------------------------------------------------------------------------------
FAST_COMPILE        root's creation
<000D4808>                                 Routine failure.              Exit
-------------------------------------------------------------------------------