Add stencil data

stencil_2.csv

+bench_id,compile,measurement,tasks,num_iters,grid_size,avg_t(s),rate (MFlops/s)
+41,base,base,24,400,20000,0.093211,47195.414773
+41,base,must,24,400,20000,0.101288,43431.658425
+41,tsan,base,24,400,20000,0.87652,5018.848593
+41,tsan,must,24,400,20000,1.474257,2983.956428
+41,base,base,48,400,20000,0.045422,96850.042577
+41,base,must,48,400,20000,0.053436,82324.290675
+41,tsan,base,48,400,20000,0.626195,7025.158598
+41,tsan,must,48,400,20000,0.770547,5709.090651
+41,base,base,96,400,20000,0.022924,191899.157068
+41,base,must,96,400,20000,0.033269,132227.502774
+41,tsan,base,96,400,20000,0.287862,15282.055308
+41,tsan,must,96,400,20000,0.409369,10746.1124
+41,base,base,192,400,20000,0.01104,398474.354788
+41,base,must,192,400,20000,0.029213,150587.148007
+41,tsan,base,192,400,20000,0.155908,28216.100553
+41,tsan,must,192,400,20000,0.209394,21008.772344
+41,base,base,384,400,20000,0.005288,831945.953164
+41,base,must,384,400,20000,0.035963,122325.029349
+41,tsan,base,384,400,20000,0.079069,55636.650885
+41,tsan,must,384,400,20000,0.121535,36196.216854
\ No newline at end of file