Print general usage information for event_log_analyzer
Print general usage information for event_log_analyzer

Print general usage information for event_log_analyzer (in addition to listing the command line flags) when called with '--help'.

BUG=None

Review-Url: https://codereview.webrtc.org/2986573002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#19104}

ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc