snippet: Updated all snippet tags

Ensure all src C++ headers which have corresponding C++ examples have
doxygen tags which point to those examples.  Some were missing, some
were invalid, some needed to be updated to match the new example names.

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

src/lcd/eboled.hpp

@@ -79,7 +79,7 @@ namespace upm
    * <a href=https://creativecommons.org/licenses/by-nc-sa/3.0/>
    * CC BY-NC-SA-3.0</a>.</em>
    *
-   * @snippet eboled.cxx Interesting
+   * @snippet i2clcd-eboled.cxx Interesting
    */
   class EBOLED : public LCD
   {