gdb/190: mi tests assume target isn't pre-threaded

[ac131313@cygnus.com]

>Number:         190
>Category:       gdb
>Synopsis:       mi tests assume target isn't pre-threaded
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 09 19:37:59 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     ac131313@cygnus.com
>Release:        unknown-1.0
>Organization:
>Environment:
Generic
>Description:
Some targets are pre-threaded.  Consequently, there is always at least one thread.

For such targets, the MI tests see thread="1" instead of thread="0" when ever a breakpoint is hit.  This in turn causes the MI tests to fail when they could pass.
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: