Do not use |target_os="chromeos"| for libFuzzer and AFL build configurations.

Usage of 'chromeos_with_codecs' mixin, that adds target_os="chromeos",
leads to loosing of 36 active and 3 disabled fuzzers.
This CL doesn't lead to loosing of any fuzzers and also brings
back those 36 and 3 fuzzers.

R=aizatsky@chromium.org, dalecurtis@chromium.org, dpranke@chromium.org, inferno@chromium.org
BUG=638935

Review-Url: https://codereview.chromium.org/2291123006
Cr-Commit-Position: refs/heads/master@{#415638}
1 file changed