message: Update ocl.cpp function Device::OpenCLVersion()
  Instead of CL_DEVICE_EXTENSIONS in Querying OpenCLVersion, it should be CL_DEVICE_VERSION flag which needs to be passed to the function.
diff: @@ -1935,7 +1935,7 @@ String Device::OpenCL_C_Version() const
  { return p ? p->getStrProp(CL_DEVICE_OPENCL_C_VERSION) : String(); }
  String Device::OpenCLVersion() const
  -{ return p ? p->getStrProp(CL_DEVICE_EXTENSIONS) : String(); }
  +{ return p ? p->getStrProp(CL_DEVICE_VERSION) : String(); }
  int Device::deviceVersionMajor() const
  { return p ? p->deviceVersionMajor_ : 0; }
  