Completes the renaming of nanoFiberStart() -> fiber_fiber_start().
There is little value in listing the callers of _NewContext() in its function
header. Not only was the (deleted) list both incomplete and wrong, keeping
it around and properly updated requires error prone maintenance.
Change-Id: Ic45f51b285c027a2e8be331c0d28c16bdc97647d
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>