Build: Use angle brackets for enums.cpp include

bindings/cxx/classes.cpp

@@ -17,7 +17,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "libsigrokcxx/libsigrokcxx.hpp"
+#include <libsigrokcxx/libsigrokcxx.hpp>
 
 #include <sstream>
 #include <cmath>
@@ -1619,6 +1619,6 @@ string Output::receive(shared_ptr<Packet> packet)
 	}
 }
 
-#include "enums.cpp"
+#include <enums.cpp>
 
 }