In order to catch errors faster, this change enables asserts on
Chromium trybots.

Change-Id: Ifdc4c9e0ec7d54aa7f6f333d992054c4e0062efe
Reviewed-on: https://swiftshader-review.googlesource.com/12328Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>