examples: Added ending 'Interesting' tags

A handful of examples were missing the terminating 'Interesting' tag.
Added these.

Signed-off-by: Noel Eck <noel.eck@intel.com>

examples/c++/curieimu.cxx

@@ -76,6 +76,7 @@ main(int argc, char **argv)
     printf("motion is: %d, %d, %d, %d, %d, %d\n", m, n, o, p, q, r);
 
     delete sensor;
+    //! [Interesting]
 
     return 0;
 }

examples/c++/light-controller.cxx

@@ -95,4 +95,4 @@ int main( int argc, char **argv )
    return status;
 }
 
-
+//! [Interesting]

examples/c++/nlgpio16.cxx

@@ -31,6 +31,7 @@
 using namespace std;
 using namespace upm;
 
+//! [Interesting]
 int main(int argc, char **argv)
 {
   // Instantiate a NLGPIO16 Module on the default UART (/dev/ttyACM0)

examples/c++/ozw-aeotecdsb09104.cxx

@@ -119,5 +119,6 @@ int main(int argc, char **argv)
 
   delete sensor;
 
+  //! [Interesting]
   return 0;
 }

examples/c++/ozw-aeotecdw2e.cxx

@@ -104,6 +104,7 @@ int main(int argc, char **argv)
   cout << "Exiting..." << endl;
 
   delete sensor;
+//! [Interesting]
 
   return 0;
 }

examples/c++/ozw-aeotecsdg2.cxx

@@ -122,6 +122,7 @@ int main(int argc, char **argv)
   cout << "Exiting..." << endl;
 
   delete sensor;
+//! [Interesting]
 
   return 0;
 }

examples/c++/ozw-aeotecss6.cxx

@@ -112,6 +112,7 @@ int main(int argc, char **argv)
   cout << "Exiting..." << endl;
 
   delete sensor;
+//! [Interesting]
 
   return 0;
 }

examples/c++/ozw-tzemt400.cxx

@@ -110,5 +110,6 @@ int main(int argc, char **argv)
 
   delete sensor;
 
+//! [Interesting]
   return 0;
 }

examples/c++/si7005.cxx

@@ -30,6 +30,7 @@
 #define EDISON_GPIO_SI7005_CS 20
 
 
+//! [Interesting]
 int main ()
 {
    try {
@@ -47,5 +48,4 @@ int main ()
    }
    return 0;
 }
-
 //! [Interesting]