vchoi_fork

[svn-r10550] Purpose:  Splitting dtypes.c

Description:  Yesterday, dtypes.c was split into two programs, dtypes.c and dt_atomic.c.
After dt_atomic.c was added, dtypes.c remained the same as before waiting for the
daily test to pass.  While dt_atomic.c turned out fine today, the  test in dt_atomic.c
was taken out from dtypes.c.  There's also some minor change in dt_atomic.c.


Platforms tested: h5committest