UpdaterCommon/CMakeLists: Specify headers in target sources

Source/Core/UpdaterCommon/CMakeLists.txt

@@ -1,9 +1,13 @@
 add_library(updatercommon
-  UpdaterCommon.cpp)
-  
+  UI.h
+  UpdaterCommon.cpp
+  UpdaterCommon.h
+)
+
 target_link_libraries(updatercommon PRIVATE
   uicommon
   mbedtls
   z
   ed25519
-  cpp-optparse)
+  cpp-optparse
+)