Example program for dgerfs

This example solves the system of equations AX=B using iterative refinement and to compute the forward and backward error bounds, where
A= 1.80 2.88 2.05 -0.89 5.25 -2.95 -0.95 -3.80 1.58 -2.69 -2.90 -1.04 -1.11 -0.66 -0.59 0.80   and   B= 9.52 18.47 24.35 2.25 0.77 -13.28 -6.22 -6.21 .  
Here A is nonsymmetric and must first be factorized by dgetrf.