[RFA] Don't reset watchpoint block on solib load.

[Vladimir Prus]

Vladimir Prus wrote:

> I attach the revised patch with that extra if, does it look OK?

In fact, you might want to hold off reviewing this patch until:

1. I post revised patch to make watchpoints use multiple locations,
which will also introduce a single function to update watchpoint
that will be used in breakpoint_re_set_one.

2. I figure out why current unmodified GDB does not actually handle
watchpoints on variables in shared libraries that get loaded, and
segfaults. 

- Volodya