resolves L2SDP-191

Closes L2SDP-191

applications/lofar2/designs/lofar2_unb2b_ring_opencl/host/lib/common/inc/common.h

+#include <iostream>
+#include <sstream>
+#include <fstream>
+#include <iomanip>
+
+#define CL_HPP_ENABLE_EXCEPTIONS
+#define CL_HPP_MINIMUM_OPENCL_VERSION 120
+#define CL_HPP_TARGET_OPENCL_VERSION 120
+#define CL_HPP_ENABLE_PROGRAM_CONSTRUCTION_FROM_ARRAY_COMPATIBILITY
+#include <CL/cl2.hpp>
+
+void init(
+    cl::Context &context,
+    std::vector<cl::Device> &devices);
+
+void print_platform(
+    cl::Platform &platform);
+
+void print_device(
+    cl::Device &device,
+    bool marker = false);
+
+std::string get_source(
+    std::string& filename);
+
+std::string get_flags();
+
+cl::Program compile_program(
+    cl::Context& context,
+    cl::Device& device,
+    std::string& source);
+
+void write_source(
+    std::string& source,
+    std::string& filename);
+
+cl::Program get_program(
+    cl::Context& context,
+    cl::Device& device,
+    std::string& filename);
+
+cl::Kernel get_kernel(
+    cl::Program& program,
+    std::string& name);
+
+double compute_runtime(
+    cl::Event& start,
+    cl::Event& end);