Update http_parser.rb in fluentd

Now http_parser.rb 0.8.1 uses typed data.

Author: nobu

benchmarks/fluentd/Gemfile.lock

@@ -53,7 +53,7 @@ GEM
       webrick (~> 1.4)
       yajl-ruby (~> 1.0)
       zstd-ruby (~> 1.5)
-    http_parser.rb (0.8.0)
+    http_parser.rb (0.8.1)
     io-endpoint (0.15.2)
     io-event (1.10.2)
     io-stream (0.7.0)
@@ -108,7 +108,7 @@ CHECKSUMS
   fiber-local (1.1.0) sha256=c885f94f210fb9b05737de65d511136ea602e00c5105953748aa0f8793489f06
   fiber-storage (1.0.1) sha256=f48e5b6d8b0be96dac486332b55cee82240057065dc761c1ea692b2e719240e1
   fluentd (1.19.0) sha256=96530a9d5706dfd3672efea69270004756ea9ee44d7788113102798c345ed400
-  http_parser.rb (0.8.0) sha256=5a0932f1fa82ce08a8516a2685d5a86031c000560f89946913c555a0697544be
+  http_parser.rb (0.8.1) sha256=9ae8df145b39aa5398b2f90090d651c67bd8e2ebfe4507c966579f641e11097a
   io-endpoint (0.15.2) sha256=1e7e90bb683945288075b43ac505aba11460a281600236b5f8fbc210cf878f25
   io-event (1.10.2) sha256=abe043a317df429db3670c7c246c167eda190cb5e9b5c543b1691970c9c3a13e
   io-stream (0.7.0) sha256=f80f46103828f43a554a2980f8bbce257e879ca6ff400f3f774bac09d9e325bd