Add an own CMakeLists.txt to armem/server/

source/RobotAPI/components/armem/CMakeLists.txt

 # memory servers
-add_subdirectory(server/ExampleMemory)
-add_subdirectory(server/GeneralPurposeMemory)
-add_subdirectory(server/ObjectMemory)
-add_subdirectory(server/RobotSensorMemory)
-add_subdirectory(server/SkillsMemory)
+add_subdirectory(server)
 
 # memory server addons
 

source/RobotAPI/components/armem/server/CMakeLists.txt

+add_subdirectory(ExampleMemory)
+add_subdirectory(GeneralPurposeMemory)
+add_subdirectory(ObjectMemory)
+add_subdirectory(RobotSensorMemory)
+add_subdirectory(SkillsMemory)