Handle hardcode-dll-paths a little bit differently.
* new/targets.jam
(basic-target.compute-usage-requirements): Add second parameter 'targets'.
* new/builtin.jam
(lib-target-class.compute-usage-requirements): Add proper <dll-path>
properties when <hardcode-dll-paths> in in properties.
(lib-target.adjust-properties): Don't handle <hardcode-dll-paths>.
[SVN r20441]