users: repair previous "fix"

The build failure on openSUSE is real, but the "fix" switched
the internal library accidentally to SHARED, without installing it.
It shouldn't be a library at all, really (if STATIC won't do).

FIXES #2203

src/modules/users/CMakeLists.txt

@@ -45,17 +45,20 @@ set(_users_src
 )
 
 # This part of the code is shared with the usersq module
-calamares_add_library(
-    users_internal
-    EXPORT_MACRO PLUGINDLLEXPORT_PRO
-    TARGET_TYPE OBJECT
-    NO_INSTALL
-    NO_VERSION
-    SOURCES
+add_library(users_internal
+    OBJECT
         ${_users_src}
-    LINK_LIBRARIES
-        ${USER_EXTRA_LIB}
 )
+target_link_libraries(users_internal
+    PRIVATE
+        ${USER_EXTRA_LIB}
+        ${Calamares_LIBRARIES}
+        ${qtname}::Core
+        ${qtname}::Gui
+        ${qtname}::Widgets
+)
+set_target_properties(users_internal PROPERTIES COMPILE_DEFINITIONS PLUGINDLLEXPORT_PRO)
+calamares_automoc(users_internal)
 
 calamares_add_plugin(users
     TYPE viewmodule