Forgot to add both subdirectories for ENABLE_BOTH

Author: mominul

src/engine/CMakeLists.txt

@@ -12,6 +12,11 @@ if (OS_LINUX)
         add_subdirectory(fcitx)
     endif()
 
+    if(ENABLE_BOTH)
+        add_subdirectory(ibus)
+        add_subdirectory(fcitx)
+    endif()
+
     ## Include subdirectories
     add_subdirectory(riti)
 endif (OS_LINUX)