Increase number of concurrent requests that fiddlecli makes to fiddle.skia.org.

Bug: skia:
Change-Id: I6de7bfadf9c955f7c08c670164f78a988ab7ab9f
Reviewed-on: https://skia-review.googlesource.com/137860
Auto-Submit: Joe Gregorio <jcgregorio@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
diff --git a/infra/bots/recipes/bookmaker.py b/infra/bots/recipes/bookmaker.py
index 9e5ae36..9d34400 100644
--- a/infra/bots/recipes/bookmaker.py
+++ b/infra/bots/recipes/bookmaker.py
@@ -83,6 +83,7 @@
       cmd = [fiddlecli_binary,
              '--input', fiddlecli_input,
              '--output', fiddlecli_output,
+             '--procs', 10, # Number of concurrent requests.
              '--logtostderr',
              '--force',
           ]