Create dsfmt_with_open_mp_test.c

simple loop test of open_mc using dsfmt.c Merresine twister
  20 July, 2013: DLW/ W9DKI
  Hilbert Space Technical Arts, LLC

  compile:
    gcc -Wall -msse2 -fopenmp -frename-registers -malign-double -fno-strict-aliasing -DHAVE_SSE2=1 -DDSFMT_MEXP=19937 -o openmp_test_2 dSFMT.c openmp_test_2.c -lm -lrt

  NUM_THREADS:
  default # of threads to n in Ubuntu use the command line:  export OMP_NUM_THREADS=n