message: Fix jacobi.c build by importing the mysecond() routine from stream.c
diff: #include <stdlib.h>
  #include <string.h>
  #include <math.h>
  -#include <time.h>
  #include <unistd.h>
  #include <errno.h>
  #define CACHE_SIZE (256*1024)
  #define ALIGN(x,a) (((x)+(a)-1)&~((a)-1))
  +/* A gettimeofday routine to give access to the wall
  + clock timer on most UNIX-like systems. */
  +
  +#include <time.h>
  +#include <sys/time.h>
  +
  double mysecond()
  {
  - struct timeval tp;
  - struct timezone tzp;
  - int i;
  + struct timeval tv;
  - i = gettimeofday(&tp,&tzp);
  - return ( (double) tp.tv_sec + (double) tp.tv_usec * 1.e-6 );
  + gettimeofday(&tv, NULL);
  + return ((double) tv.tv_sec + (double) tv.tv_usec * 1.e-6);
  }
  -
  static int generate_empty_matrix(double*** A , unsigned int N) {
  unsigned int iCnt;
  int i,j;
  