CUDA: Add tests to verify CUDA compiler works properly.

Tests/Cuda/ObjectLibrary/main.cpp

@@ -0,0 +1,20 @@
+
+#include <iostream>
+
+int static_func(int);
+int file1_sq_func(int);
+
+void test_functions()
+{
+  file1_sq_func(static_func(42));
+}
+
+int main(int argc, char** argv)
+{
+  test_functions();
+  std::cout
+    << "this executable doesn't use cuda code, just call methods defined"
+    << std::endl;
+  std::cout << "in object files that have cuda code" << std::endl;
+  return 0;
+}