Before this CL, the GN template webrtc_fuzzer_test was using a build
config that was different from the one used by other WebRTC's targets.
We discovered this in [1] where we detected that RTC_DCHECK_IS_ON had
different values across translation units (1 everywhere and 0 in the
one of the .cc file owned by the webrtc_fuzzer_test).
This was because webrtc_fuzzer_test was not including the default
config //:common_config in its "configs".
[1] - https://webrtc-review.googlesource.com/c/src/+/226465
Bug: None
Change-Id: I5635d90281769c23c5d86ebc8cb494da029c2e85
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226540
Reviewed-by: Andrey Logvin <landrey@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34509}