compile samsung makernote, else linking is broken...

src/CMakeLists.txt

@@ -79,6 +79,7 @@ SET( LIBEXIV2_HDR         basicio.hpp
                           psdimage.hpp
                           rafimage.hpp
                           rw2image.hpp
+                          samsungmn.hpp
                           tags.hpp
                           tgaimage.hpp
                           tiffimage.hpp
@@ -123,6 +124,7 @@ SET( LIBEXIV2_SRC         basicio.cpp
                           psdimage.cpp
                           rafimage.cpp
                           rw2image.cpp
+                          samsungmn.cpp
                           sigmamn.cpp
                           sonymn.cpp
                           tags.cpp