Remove all "strace" calls from the testsuite.

[Joel Brobecker]

> Anyone know of any reason not to apply this?

Not from me, but you already knew that...

> gdb/testsuite/
> 2012-01-12  Pedro Alves  <palves@redhat.com>
> 
> 	Remove all calls to strace.

The reason why I am replying is because I was wondering if you could
also put strace in the banned_variable list in gdb.exp? That way,
we're certain that it won't come back unnoticed.

Thanks for doing this...

-- 
Joel