add hello linux package

gradle-cpp-plugin/04-hello-linux-package/build.gradle

@@ -0,0 +1,8 @@
+apply plugin: 'cpp'
+plugins {
+  id "nebula.os-package" version "2.0.3"
+}
+
+executables {
+    main
+}

gradle-cpp-plugin/04-hello-linux-package/src/cpp/hellomuni.cpp

@@ -0,0 +1,9 @@
+#include <iostream>
+
+using namespace std;
+
+int main() {
+    cout << "Hello FI MUNI!" << endl;
+    return 0;
+}
+