Show all stream output lines where the array validation checks fail.

The error checking that stream does produces errors when memory
isn't working reliably look like this:

-------------------------------------------------------------
Failed Validation on array a[]
        Expected  : 2250990824307890585600.000000
        Observed  : 2250990759458997010432.000000
-------------------------------------------------------------

Due to how stream-scaling filters the output from the program to
make it less verbose, those were not shown when they appeared with
more than 1 thread active.  Now all three of the error lines in
that case will show up.

stream-scaling

@@ -343,7 +343,7 @@ while [[ $i -le $MAX_CORES ]] ; do
     ./stream
   else
     # Show just a summary after the first line.
-    ./stream | egrep "Number of Threads requested|Function|Triad"
+    ./stream | egrep "Number of Threads requested|Function|Triad|Failed|Expected|Observed"
   fi
 
   ((i++))