[pushed] Fix gdb.threads/thread-specific-bp.exp race

[Gary Benson]

Pedro Alves wrote:
> Gary stumbled on this:
> 
>  (gdb) PASS: gdb.threads/thread-specific-bp.exp: all-stop: continue to end
>  info threads
>    Id   Target Id         Frame
>  * 1    Thread 0x7ffff7fdb700 (LWP 13717) "thread-specific" end () at /home/gary/work/archer/startswith/src/gdb/testsuite/gdb.threads/thread-specific-bp.c:29
>  (gdb) FAIL: gdb.threads/thread-specific-bp.exp: all-stop: thread start is gone
>  info breakpoint
> 
> The problem is that "...archer/startswith/src..." has a "start" in
> it, which matches the too-lax regex in the test.
> 
> Rather than tweaking the regex, we can just remove the whole "info
> threads", like we removed similar ones in other files -- GDB
> nowadays does this implicitly already, so things should work without
> it.  Thus removing this even improves testing here a bit.
> 
> gdb/testsuite/ChangeLog:
> 2015-03-04  Pedro Alves  <palves@redhat.com>
> 
> 	* gdb.threads/thread-specific-bp.exp: Delete "info threads" test.

Thanks for fixing this Pedro.

Cheers,
Gary

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