[patch] recognise when an exec()d process terminates due to unhandled exception

[Brian Dessent]

Eric Blake wrote:

> Should we also mention 'cygcheck ./dll_not_found' to find out which ones
> are missing?

It might be a good idea.  On the other hand it's kind of long already. 
I'm totally not married to what I've got for the wording though,
consider it a very rough draft.

> | missing_import.exe: an entry point for one of more symbols could not be
> | found during program initialization.  Usually this means an incorrect
> | or out of date version of one or more DLLs is being erroniously found
> | on the PATH.
> | Killed
> 
> s/erroniously/erroneously/

Drat and s/one of more/one or more/ as well.

Brian