[RFA] Change program_space::added_solibs to a std::vector

[Tom Tromey]

>>>>> "Simon" == Simon Marchi <simon.marchi@ericsson.com> writes:

>> bool any_deleted = !current_program_space->deleted_solibs.empty ();
>> -  int any_added
>> -    = !VEC_empty (so_list_ptr, current_program_space->added_solibs);
>> +  int any_added = !current_program_space->added_solibs.empty ();

Simon> bool?

I made this change.

Tom