tools/power turbostat: fix buffer overrun

turbostat could be terminated by general protection fault on some latest
hardwares which (for example) support 9 levels of C-states and show 18
"tADDED" lines. That bloats the total output and finally causes buffer
overrun.  So let's extend the buffer to avoid this.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Len Brown <len.brown@intel.com>

tools/power/x86/turbostat/turbostat.c

@@ -5131,7 +5131,7 @@ int initialize_counters(int cpu_id)
 
 void allocate_output_buffer()
 {
-	output_buffer = calloc(1, (1 + topo.num_cpus) * 1024);
+	output_buffer = calloc(1, (1 + topo.num_cpus) * 2048);
 	outp = output_buffer;
 	if (outp == NULL)
 		err(-1, "calloc output buffer");