security watch: the RUNTIME line names the zstd decoder in words, not the module repr (R-1327)

scripts/security_watch.py

@@ -884,7 +884,7 @@ def main(argv):
         st = rreader.stats
         print("RUNTIME read=%d (%.0f s) from-cache=%d not-checked=%d zstd-decoder=%s" % (
             st["read"], st["read_s"], st["cached"], st["not_checked"],
-            image_runtime.zstd_decoder()[1] if st["read"] else "not needed"))
+            image_runtime.zstd_decoder_how() if st["read"] else "not needed"))
     print("REQUESTS " + " ".join("%s=%d" % kv for kv in sorted(net.requests.items())))
     state_path = opts.get("state")
     state, missing = {}, True