Chrome tests apparently require these now, so implement
these to avoid Linux (debug) related crashes.

Change-Id: I603e69eeee166affaf6d456039d75b71d33c3914
Reviewed-on: https://swiftshader-review.googlesource.com/16329Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>