Compile Fluent Bit with HTTP server support.
Compile Fluent Bit with HTTP server support.

We enable the HTTP server in our generated Fluent Bit configuration
(see fluentbit/conf/conf.go), but we didn't have support compiled into
the binary.  Therefore, when I tried `curl localhost:2020`, I got
connection refused.  With this PR, the curl command now works.

Change-Id: I43de14d6c2a6de130652b9def6e6bad88e0734c5

GoogleCloudPlatform/ops-agent,GoogleCloudPlatform/ops-agent