Use TDE dummy.cpp file for consistency with other packages.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit a23b480df7)

kbackgammon/engines/CMakeLists.txt

@@ -28,8 +28,6 @@ link_directories(
 )
 
 
-file( WRITE ${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp "" )
-
 ##### kbgengines (static) #######################
 
 tde_add_library( kbgengines STATIC_PIC AUTOMOC
@@ -37,3 +35,5 @@ tde_add_library( kbgengines STATIC_PIC AUTOMOC
   LINK kbgoffline-static kbggnubg-static kbggeneric-static kbgfibs-static
     kbgnextgen-static
 )
+
+configure_file( ${TDE_CMAKE_TEMPLATES}/tde_dummy_cpp.cmake dummy.cpp COPYONLY )