Hide syslog's LOG_INFO from the rest of the code

Both syslog and the base namespace have LOG_INFO symbols and
in certain cases (which include, but is not limited to,
jumbo builds) those will clash.

This patch undefs the syslog LOG_INFO macro
as is already done with LOG_WARNING previously.

Change-Id: Iff59a2ef079d3bb38378af76932b21a128507353
Reviewed-on: https://chromium-review.googlesource.com/1027611
Commit-Queue: Daniel Bratell <bratell@opera.com>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574103}
1 file changed