re-add dummy printf to fix bots

Bug: skia:
Change-Id: I3184736f37481c5ac20eae1a15c17aed4f3c3e52
Reviewed-on: https://skia-review.googlesource.com/89441
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

bench/nanobench.cpp

@@ -1059,6 +1059,7 @@ public:
             }
         }
         if (0 == strcmp(fBenchType, "recording")) {
+            log->metric("bytes", 0); // TODO: update bot expectations so we can remove this
             log->metric("ops",   fSKPOps);
         }
     }