ensure we print error message in bcmLogFatal
ensure we print error message in bcmLogFatal

Summary:
We occasionally (read most of the time) crash when we try to
dump the hw state to a file on fatal log messages. This reorders the
code slightly so that the message we want to log always gets logged,
even if dumping hardware state segfaults.

Differential Revision: D4768691

fbshipit-source-id: 3c2435579b8d6309ab22ffdfb9b5aa9e28d19804

peterlei/fboss,peterlei/fboss,peterlei/fboss,peterlei/fboss