[PATCH] Fix gdb.ada/watch_arg.exp test with always inserted and displaced stepping on

[Joel Brobecker]

> The "problem" is that setting both always inserted and displaced
> stepping on, actually fixes PR7143.  That is, the test sets a
> watchpoint on X, and assumes that it does not trigger.  But, it
> actually should trigger.

Sometimes, I'm not sure what, if anything, goes through my brain...
You're right, of course.

> I notice that what the Foo procedure does is not really important,
> so an easy fix is to make Foo not touch X, thus we have the same
> behavior even if PR7143 is fixed.

I would rather make sure that X still gets referenced, to make sure
a smart tool/compiler/linker does not play games. Can you try the
attached?

-- 
Joel
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