CodecInst operator<<
CodecInst operator<<

I always find myself re-writing this function for debug purposes. It'd
save so much time if it already existed...

BUG=none

Review-Url: https://codereview.webrtc.org/2589773002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#15677}

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