RSM

...G...... [ZBX-6470] fix swap calculation on Solaris

Previously we used swapctl() call with parameters that gave incorrect
values on some versions of Solaris. New approach is to use swapctl()
call with SC_AINFO command and using struct anoninfo which guarantees
proper results on all versions.

The calculations are made the same way swap -s works:
  total = total swap memory
  used = allocated + reserved
  free = total - used

[svn merge ^/branches/2.0 -c r35259]