coroutine: fix compiler wrning in tests


[SVN r85976]
coroutine: fix noinline attribute for MSVC in segmented-stack example


[SVN r85977]
coroutine: fixing export issue for MSVC; increase used stacksize for example


[SVN r85979]
coroutine: fix documentation


[SVN r85980]
coroutine: fix missing 'inline' (MSVC)


[SVN r85983]
coroutine: type in docu


[SVN r86341]