tests with demos need install rules

demo/CMakeLists.txt

@@ -15,6 +15,7 @@ foreach(s ${sources})
   get_filename_component(swe ${s} NAME_WE)
   add_executable(${swe} ${s})
   target_link_libraries(${swe} ${BASIS_LIBS})
+  install(${swe})
 endforeach(s)
 
 #create the output dir