unified: Ensure K_THREAD_DEFINE() generates a thread id

Previously the macro provided no way for an application to
easily reference a statically-defined thread.

Change-Id: I552e5f4ab4e6e8a793bb3a6a2b0c2636b900023a
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
1 file changed