clean up code structure a bit

mission/system/acs/CMakeLists.txt

@@ -9,4 +9,5 @@ target_sources(
           SusAssembly.cpp
           AcsBoardFdir.cpp
           acsModeTree.cpp
-          SusFdir.cpp)
+          SusFdir.cpp
+          StrFdir.cpp)

mission/system/fdir/CMakeLists.txt

@@ -1,2 +1 @@
-target_sources(${LIB_EIVE_MISSION} PRIVATE RtdFdir.cpp StrFdir.cpp
-                                           GomspacePowerFdir.cpp)
+target_sources(${LIB_EIVE_MISSION} PRIVATE RtdFdir.cpp)

mission/system/power/CMakeLists.txt

@@ -0,0 +1,2 @@
+target_sources(${LIB_EIVE_MISSION} PRIVATE RtdFdir.cpp StrFdir.cpp
+                                           GomspacePowerFdir.cpp)