Don't reset watchpoint block on solib load.

    Don't reset watchpoint block on solib load.

        * breakpoint.c (insert_bp_location): For watchpoints,
        recompute condition.
        (breakpoint_re_set_one): Instead of recomputing value
        and condition for watchpoints, just reset value and
        let insert_breakpoints/insert_bp_location recompute it.
        Don't do anything about disabled watchpoint.