update OpenCL Driver 16.1 > 18.1 (#1524)

tools/webcam/README.md

@@ -18,7 +18,7 @@ git clone https://github.com/commaai/openpilot.git
 - Follow [this readme](https://github.com/commaai/openpilot/tree/master/tools) to install the requirements  
 - Add line "export PYTHONPATH=$HOME/openpilot" to your ~/.bashrc  
 - You also need to install tensorflow 2.2 and nvidia drivers: nvidia-xxx/cuda10.0/cudnn7.6.5  
-- Install [OpenCL Driver](http://registrationcenter-download.intel.com/akdlm/irc_nas/12556/opencl_runtime_16.1.2_x64_rh_6.4.0.37.tgz)  
+- Install [OpenCL Driver](http://registrationcenter-download.intel.com/akdlm/irc_nas/vcp/15532/l_opencl_p_18.1.0.015.tgz)  
 - (Note: the code assumes cl platforms order to be 0.GPU/1.CPU when running clinfo; if reverse, change the -1 to -2 in selfdrive/modeld/modeld.cc#L130; helping us refactor this mess is encouraged)  
 - Install [OpenCV4](https://www.pyimagesearch.com/2018/08/15/how-to-install-opencv-4-on-ubuntu/) (ignore the Python part)