Update set of known root certificates.
Update set of known root certificates.

This has been automatically generated by running [1].

See https://codereview.webrtc.org/1503473002 for some background about
the generator script.

[1] - https://cs.chromium.org/chromium/src/third_party/webrtc/tools_webrtc/sslroots/generate_sslroots.py

Bug: chromium:978779
Change-Id: I78cf8947b3363738dd0e21182348253dbad95f02
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/173821
Reviewed-by: Taylor <f49cf6381e322b147053b74e4500af8533ac1e4c@webrtc.org>
Reviewed-by: Harald Alvestrand <ce816cd73d80f958d82de1df356058c2d2bca378@webrtc.org>
Commit-Queue: Mirko Bonadei <d2c43c210eae6feef04f53bae50885e8152edcca@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#31131}

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