Fix BB46 (inline targets renaming).
* new/targets.jam
(project-target.add-alternative): New rule.
(project-target.build-main-targets): New rule.
(project-target.generate, project-target.main-target,
project-target.has-main-target): Call 'build-main-targets'
(project-target.rename-main-target): Remove.
(main-target-sources): Use 'rename', not project.rename-main-target.
(main-target-alternative): Simplify.
* test/inline.py: Test for fix.
[SVN r19245]
Vladimir Prus