Adding cpp file for GH Languages percentage

Author: cliffg-softwarelibre

cpp_file_for_gh.cpp

@@ -0,0 +1,8 @@
+// Cliff note - I've burned hours and hours trying to get the GitHub Languages percentage
+// histogram to be correct with respect to having C++ files in the Presentations repo.
+//
+// So this file is simply a C++ file that doesn't really do anything.
+
+int main() {
+  return 0;
+}