Bug 1201811 (part 2) - Don't print distribution stats if there was only 1 sample. r=erahm.

--HG--
extra : rebase_source : aa6b26441c5ca285a15d58d97a62f064e891d09b

tools/power/rapl.cpp

@@ -679,7 +679,7 @@ Finish()
     int(n), n == 1 ? "" : "s",
     n * gSampleInterval_sec, time == 1.0 ? "" : "s");
 
-  if (n == 0) {
+  if (n == 0 || n == 1) {
     exit(0);
   }