Remove runtime stack alignment from _NewContext()

Runtime alignment of a context's stack is no longer necessary in _NewContext()
as the memory is aligned (via the __stack tag) before calling _NewContext().

Change-Id: I31b7fd883ea3f1dcdb378e8ff508430bc75afcde
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
3 files changed