This CL bounds the supppression gain for higher frequencies where
the estimate of the residual echo sometimes is less accurate.
Bug: webrtc:8320
Change-Id: I02b21e6b1758c7e8b6660c1631a05c956a45e4c8
Reviewed-on: https://webrtc-review.googlesource.com/5260
Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org>
Commit-Queue: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20081}